ZL1 Performance Parts

The ZL1 doesn’t need much to stand out. It rolls off the line already looking aggressive and pulling serious numbers. But for drivers who know the difference between stock and sorted, there’s always room to go further. That’s where performance parts come in, not just to add power, but to build something that feels cleaner, sharper, and more dialed in. This isn’t about chasing trends. It’s about turning a great platform into your own personal benchmark.

LTR Standard Deck Wet Aluminum Block
from $6,625.00

2,000+ HP LTR Gen V LT Race Block

The new foundation for four-digit power.
If you’ve reached the limit of the factory LT block, or you simply want some extra piece of mind on your next build, then this just may be your answer. The LTR-SD10X is a U.S.-made, all-aluminum Gen V LT race block engineered for extreme boost, big cubic-inch builds, and the kind of durability the OEM casting simply can’t deliver. Designed to accept OEM LT accessories but built with aftermarket-level strength, this is the block serious LT builders have been waiting for.

Whether you’re chasing 1,000+ HP street reliability or 2,000+ HP competition abuse, the LTR gives you the confidence to lean on it — lap after lap, pull after pull.

Key Features

  • Cross-braced lifter valley
    Adds rigidity and individual oil drain-backs for high-rpm stability.

  • 0.750" deck / 0.625" skirt walls
    Massive structural strength where LT blocks normally fail.

  • Fully reinforced casting + HIP process
    Hot Isostatic Pressing removes porosity and maximizes material density.

  • Billet steel main caps w/ domed design
    M10 studs + side bolts + dowels = maximum crank stability under boost.

  • 120 lb total weight
    True race strength without the iron-block penalty.

  • Priority main oiling
    Oil is fed to crank and rods first — critical for high-rpm, high-load setups.

  • Ductile-iron sleeves
    Thick, shock-resistant, and ready for big bore + big cylinder pressure.

What’s in the BOX…

  • Durabond GMP-9 cam bearings

  • Rear cover + gasket + hardware

  • Plug kit & oil galley barbell plug

  • Precision-ground steel cam thrust plate

  • Transmission dowel pins

  • Rear main seal

Builder Notes…

This block is semi-machined and ready for final finish work to your exact spec.
Required machining:

  • Final deck surface (0.011" extra material left)

  • Final hone (4.110" bore as-delivered)

  • Final main bore hone (0.003" material remaining)

Cam and lifter bores are already finish-machined.

BONUS OFFER

When you select our ATI Damper + ARP Bundle, you now save nearly $300 which more than offsets the cost of shipping, easily making this the BEST LTR Deal on the internet.

Block always drop ships from Fleece Performance Engineering. Lead times to ship can vary between 3-30 days so please order in advance. Or feel free to email me by clicking THIS link to check on current lead-times and inventory.

Wanna save even more? Email me HERE with your complete build list and let me send you a custom discount code to help save even more when you add a Katech Spec head & Cam package, cooling & fuel upgrades and more…

TURN-KEY OPTIONS

Do you wanna convert this into a turn-key short or long block assembly? Let us know… we can work with our engine builder of choice FLAG MOTORSPORTS to turn this ultra-capable block into a monster of a turn-key motor to meet any application.

NOTE: We cannot ship this block to CA, but we can build you a custom motor and ship that to CA…. Email us for more information.

Granatelli High Performance Spark Plug Wires
Sale Price: $285.00 Original Price: $300.00

Save an additional $50 on a GMS Signature Hood Bracket or Belly Pan with each qualified purchase of any Granatelli Coil Pack or Spark Plug wire set by using discount code GMS-HOOD or GMS-BELLY. Deal ends December 8th.

When it comes to upgrading your OEM spark plug wires, there are only a few that offer the same construction and durability as the Granatelli Motor Sports 0 Ohm High Performance Spark Plug Wire. But for those who want their engine bay to look, as good as it runs, then the 4 color options that Granatelli offers in their high performance line of spark plug wires is second to none!

Key Features:

  • True 0 Ohm Resistance
    Full coil voltage with zero resistance ensures stronger spark energy, better throttle response, more efficient combustion, and maximum horsepower. Engineered for high-performance street and racing applications.

  • Compact 10-Inch Length (Boot End to Boot End)
    Specifically designed for ultra-tight installations where space is at a premium. With a true 10" total length, this wire set offers clean routing and precision fitment for custom LS/LT builds, coil-on-plug conversions, or relocated ignition systems.

  • RED High-Temp Silicone Insulation
    Features durable 8mm silicone jackets rated to withstand temperatures over 800°F. Built to thrive under extreme heat and vibration without loss of performance or signal integrity.

  • Spiral-Wound Stainless Steel Core
    Advanced EMI and RFI suppression keeps your electronics interference-free, making these wires fully compatible with modern ECUs and aftermarket tuning systems.

  • Made to Fit GM LS/LT-Series Engines
    Compatible with LT1, LT5, LS1, LS2, LS3, LS6, LS7, LS9, LQ4, LQ9, and other popular LS-based platforms. Offers OE-style fit and finish with professional-grade performance.

  • Proven Reliability
    Made in the USA and trusted by racers, engine builders, and performance professionals worldwide. Backed by decades of ignition engineering expertise.

Built for Tight Spaces. Tuned for Big Performance.

Granatelli Motor Sports 0 Ohm Spark Plug Wires offer maximum spark transfer and race-proven reliability in a compact 10-inch configuration—perfect for custom, high-demand applications.

Some colors may ship direct from the manufacturer.

Black Color #28-1545HTBB

Blue Color #28-1545HTBLB

Red Color #28-1545HTRB

Yellow Color #28-1545HTYB

Katech 103mm Throttle Body
from $725.00

As everyone knows, an engines goal is to get as much air in & out as fast as possible, in order to make power. The more air in can flow with one revolution, the power you will make.

Which is why the 103mm throttle body has been the gold standard for stock and ported 1.7L blowers focused on making more power, by way of reducing restrictions within the air inlet track.

The Katech 103mm throttle body is the ultimate upgrade for performance enthusiasts who demand exceptional form and function. Crafted from high-grade billet aluminum, this throttle body is designed to push your engine to new heights, delivering an explosive increase in throttle response and a serious horsepower boost when paired with other mods like a Rotofab Big Gulp or Kong X-ported blower.

At a massive 103mm in diameter, this throttle body dwarfs the stock throttle body found in LT engines, unlocking a flood of airflow for unmatched performance. The precision-machined design ensures air flows smoothly and efficiently, reducing turbulence and maximizing every drop of power your engine can produce. Constructed with GM electronics and honed on a state-of-the-art 5-axis CNC machine, this throttle body is engineered to perform at the highest level.

If you desire the black anodized finish, there is an option below to upgrade.

Fitment; C7 Corvette LT1 and Gen 6 Camaro LT1 with MSD or other intakes with a minimum opening of 103mm. C7 Corvette LT4, V3 CTS-V LT4 and Gen 6 Camaro LT4 with ported supercharger snout. C7 Corvette ZR1 LT5 with adapter. The LT5 bolt pattern is different than this throttle body.

WILL NOT WORK WITH STOCK LT1 INTAKE OR STOCK UNPORTED LT4 SUPERCHARGER DOES NOT FIT 2024+ TRUCK/SUV.REQUIRES ENGINE CALIBRATION

Clear Anodized is Katech part number KAT-A6885

Black Anodized is Katech part number KAT-A6885-BLK

OPTIONAL BILLET INLET PRESSURE SENSOR

As you may or may not know, when you upgrade to a 103mm throttle body, you then create a binding conflict with the inlet pressure sensor hitting the back of the throttle body. This $35 solution allows you to rotate the sensor approx. 10 degree’s which allows for a secure installation and proper sensor function.

Although we do keep some inventory this part may ship direct from the manufacture depending on the time of your purchase.

Monster Triple Disk Clutch Package
from $2,150.00

When it comes to going fast… there are few things more critically important to getting all that power you have been laser focused on making that your clutch. Considering how important of a role it plays from racing to stop and go traffic it’s a wonder why so many people forget to address it when budgeting a build. Luckily, when it comes time to upgrade, or you dumped the clutch one too many times, we have just the clutch you need for your 6th. Gen. Camaro ZL1… the infamous MONSTER TRIPLE DISK. Like all great products you have options from MILD to WILD. Lets explore the (4) flavors down below…

Monster S Series - Triple Disc Clutch - 550 - 1150 RWHP/RWTQ

The “big brother” to the S Series twin, the S Series triple utilizes the same technology but has the added bonus of being able to hold up to 1,100 rwhp/rwtq! Monster starts by using a factory GM LT1 based pressure plate setup and modifies the lift/release as well as plate load to increase performance – all while leaving the pedal effort 100% factory. Monster also adds a very beefy floater plate that won’t warp and leave you fighting release issues, and includes a long splined custom disc set that keeps rotational mass at a minimum, which helps translate to better high rpm release and happier transmission internals. These units have all the designed benefits of a factory unit with the ability to take serious abuse and generate a clean release with all GM factory based hydraulics up to 7000 rpm! Monster then wraps these assemblies up using their patent-pending CNC machined billet steel flywheel to convert them to work in numerous applications, which are all all balanced to less than 0.100 OZ/IN at no additional charge.

Long life, great performance, and factory driving characteristics are all things you can expect from the S Series triple disc clutches. While they will absolutely take a tremendous amount of abuse the only thing we don’t recommend with the S Series triple is drifting. The rigours of drifting do not do well with full-faced frictions, beyond that we highly recommend them for all other usages as long as you’re within the power rating. These units not only thrive on the street where stop and go traffic are just as easy as driving a factory car, but they also do great at the drag strip with numerous recorded 8 second passes, as well as the road course/HPDE/autocross track which allows you to take advantage of the reduced MOI and excellent high rpm release you can rest easy knowing they are up for the task, and will still get you home.

When installed and broken in properly you should expect factory smooth operation and no chatter with a factory pedal effort and engagement feel – the only exception to this is if you are using an aftermarket master cylinder as the larger displacement will increase pedal effort and reduce the engagement window.

Monster SK Series - Triple Disc Clutch - Rated to 1300 RWHP/RWTQ

The “big brother” to the SK Series twin, the SK Series triple utilizes the same technology but has the added bonus of being able to hold up to 1,300 rwhp/rwtq!  Monster starts by using a factory GM LT1 based pressure plate setup and modify the lift/release as well as plate load to increase performance – all while leaving the pedal effort 100% factory. With the addition of our Kelvar™ material, this allows them to move the power rating up 150 hp/tq from the carbon organic S series and give customers another option at this common power rating. They add a very beefy floater plate that won’t warp and leave you fighting release issues which translates to better high rpm release and happier transmission internals. These units have all the designed benefits of a factory unit with the ability to take serious abuse and generate a clean release with all GM factory based hydraulics to 7000 rpm!

Long life, great performance, and factory driving characteristics are all things you can expect from the SK Series triple disc clutches. While they will absolutely take a tremendous amount of abuse the only thing we don’t recommend with the SK Series triple is drifting. The rigours of drifting do not do well with full-faced frictions, beyond that we highly recommend them for all other usages as long as you’re within the power rating. These units not only thrive on the street where stop and go traffic are just as easy as driving a factory car, they also do great at the drag strip with numerous recorded 8 second passes, as well as the road course/HPDE/autocross track which allows you to take advantage of the reduced MOI and excellent high rpm release you can rest easy knowing they are up for the task, and will still get you home.

When installed and broken in properly you should expect factory smooth operation and no chatter with a factory pedal effort and engagement feel – the only exception to this is if you are using an aftermarket master cylinder as the larger displacement will increase pedal effort and reduce the engagement window.

Monster SC Series - Triple Disc Clutch - Rated to 1,500 RWHP/RWTQ

Pushing in excess of 1,200rwhp or ready to drift, then you should consider the SC Series Clutch. Designed to handle up to 1,500rwhp using Monster’s proprietary ceramic based lightweight friction discs that allow it to hold more power and abuse while keeping the rotational mass at a minimum – this translates to better high rpm release and happier transmission internals. These units have all the designed benefits of a factory unit with the ability to take serious abuse and generate a clean release with all GM factory based hydraulics to 7,500 rpm!

While these are great for the abuse and extreme driving conditions, these are not going to drive perfectly in daily driven applications. What do we mean? It’s going to occasionally chatter/shudder during take-off and will have a slight on/off feel to it. This is a necessary byproduct of a clutch that will hold an honest 1,500 rwhp/rwtq. We recommend this clutch for any type of power adder in a racing or aggressive street application as long as you’re within the power rating of the clutch – this provides an excellent clutch for those looking to hold big power and abuse. These units not only work on the street, they are very much at home at the drag strip with numerous recorded low 8 second passes, as well as the road course/HPDE/autocross track which allows you to take advantage of the reduced MOI and excellent high rpm release you can rest easy knowing they are up for the task, and will still get you home.

When installed and broken in properly you should expect slight amounts of chatter/shudder and a slight on/off engagement with factory pedal effort – the only exception to this is if you are using an aftermarket master cylinder as the larger displacement will increase pedal effort and reduce the engagement window.

Monster R Series - Triple Disc Clutch - Rated to 1800+ RWHP/RWTQ

If you are wondering what the “R” stands for… it’s RIDICULOUS. Which is what I would call you, if you ever asked me to sit shot-gun in your 1,800rwhp Camaro, while you set the world record for H pattern diaphragm clutches like MONSTER has done… which is just another way of saying the obvious; these units are designed for the serious racer, with some serious skills. The R Series triple disc clutches are designed for extreme racing conditions, mainly drag racing, with the ability to hold ~2,000 rwhp/rwtq with no regard for daily driving characteristics in any way. We started with the same GM LT1 based pressure plate assembly and made a TON of changes to the unit to ensure that the lift/release and plate load are all maximized to provide the absolute best performance available. We don’t care if it chatters/squeals or is aggressive, they’re a no-nonsense and unapologetic design for the intention of one thing – to run sub-8 second quarter mile passes as a diaphragm (non-slipper) setup. 

While these are great for the extreme driving conditions, these are not designed for a daily driven application. Why? Because this is a race clutch built for racing. Can you drive it on the street? Sure, but please don’t call us complaining that it’s too aggressive and loud – consider yourself warned. We recommend this clutch for any type of power adder in a racing application as long as you’re within the power rating of the clutch – this is the best clutch on the market for what it’s designed for and we’ve got the records to prove it. These units are very much at home at the drag strip with numerous recorded 7-second passes!

We recommend the use of face-plated transmissions and upgraded clutch hydraulics to maximize the potential of these setups, when installed and broken in properly you should expect it to drive like a race car, see our explanation above.

EACH PACKAGE INCLUDES;

– Monster Clutch Assembly (choice one of four options)

– NEW OEM Slave Cylinder (optional upgraded bearing support)

– 20lb. Billet steel flywheel (optional lightweight aluminum flywheel)

– GM OEM Pilot bearing

– Plastic Alignment tool

– Hardware

OPTIONAL BILLET BEARING SUPPORT $90

It’s no secret that the latest generation of slave cylinders GM has been putting in their performance cars have drawbacks. While the newer slave cylinders did much to alleviate some issues the older units had they actually have a much more severe issue to deal with. Many of the aftermarket companies are blaming the entire bearing assembly for failure. Upon research, we’ve discovered that the bearing itself isn’t the issue it’s the plastic bearing support piece upon which the bearing rides. This piece, when hot enough, disintegrates and causes some pretty catastrophic failures. This not only kills the slave cylinder, it also almost simultaneously kills the clutch in the process. Our billet bearing support eliminates this failure since it replaces the weak plastic piece with our custom piece machined from a solid chunk of USA made 6061T6 aluminum – gone will be the issues of melting plastic when our support is installed.

OPTIONAL 36” REMOTE BLEEDER $50

We recommend you flush and bleed your hydraulic system every track outing, or at the very least every other oil change. By using a remote bleeder it allows you to do this maintenance from under the hood instead of under the car, additionally it keeps the fluid run off out of the bellhousing and away from your clutch – this is critical. Our standard remote bleeders require two people, one in the vehicle pumping the clutch pedal and one at the end of the line cycling the fitting, these are robust and long lasting and the most recommended version by our users.

OPTIONAL MASTER SHIM SET $50

Master Shim Kit from Monster Clutch Company – your go-to solution for precise clutch adjustments. Fine-tune your clutch system effortlessly, with precision-cut shims and top-quality materials, achieve optimal performance under any driving conditions. Kit Includes – 0.040, .080, .090, .125” Shims.

OPTIONAL ULTRA LIGHTWEIGHT FLYWHEEL $150

The perfect way to help offset the extra weight of the heavier triple disk set-up. Seriously… the total weight of the Triple S + Ultra Lightweight Flywheel weights 17lbs less than the OEM dual disk! That only $126 per pound of weight savings. Please note, not all aluminum flywheels will ship with the green anodizing, based on the anodizing lead time. if the green color is important to your build, please email me so I can convey that to Monster when we place the order.

MONSTER FAQ’s; Can be found HERE.

MONSTER INSTRUCTIONS; Can be found HERE.

FITMENT; 2016-2024 6th Gen. Camaro (Manual Transmission Only)

NEED A MONSTER CLUTCH FOR ANOTHER VEHICLE? Email HERE and I can send you an invoice.

Brisk Racing Silver Spark Plugs
Sale Price: $10.00 Original Price: $11.50

By popular demand, GMS is proud to offer the same Brisk Silver Racing Spark Plug we have been using in our 900+ HP ZL1 for years.

Perhaps like you, I did not pay much attention to my spark plugs at first, but after talking with a few knowledgeable tuners, and other high HP enthusiast, the brand BRISK came up over and over again, so we decided to take a look.

After reading all of the technical bits below from Brisk it made sense to upgrade during the next oil change and we have not looked back since.

At our power level, we want to use the best spark plug available as cheap insurance to help us stay reliable, and make the most power possible.

Modified LT4’s demand ignition components that can withstand extreme conditions and deliver maximum efficiency, which is why Brisk Racing Silver Spark Plugs are an ideal choice for our supercharged cars. These plugs feature a silver center electrode, known for its superior thermal and electrical conductivity compared to traditional materials like copper or platinum. This results in a stronger, more consistent spark, improved throttle response, and more efficient combustion—all critical for modified, boosted and high-revving engines. Additionally, the silver construction resists fouling and maintains performance even under high-stress driving conditions, making them especially suited for the LT4. By using Brisk Racing Silver Spark Plugs, drivers can ensure their engines operate at peak performance with enhanced power, fuel efficiency, and reliability.

Running a colder spark plug helps improve combustion stability and reduce the risk of pre-ignition or detonation under increased cylinder pressures and elevated combustion temperatures. Colder plugs have a shorter insulator nose and dissipate heat more quickly to the cylinder head, keeping the firing tip cooler. This is crucial on LT4 applications where forced induction significantly raises the thermal load on the engine. By controlling plug tip temperatures, colder plugs help maintain reliable spark performance, prevent misfires, and support consistent power delivery—especially during sustained high-boost conditions.

From the Brisk website;

Brisk Silver Racing Spark Plugs have a smaller diameter silver core and conventional open spark hook type earth electrode give an outstanding performance in igniting high octane fuel mixture associated with alternative fuels like CNG, LPG, Propane, E85 blend, Alcohol, LNG, Race Fuels and Nitro. 

Silver metal is the single best material for a spark plugs core electrode, as it can dissipate heat fast, resulting in overall lower spark plug temperature and a more powerful spark. Silver is the best conductor of any metal! It conducts 560% more electricity & 481% more heat than Platinum, and 276% more electricity & 177% more heat than Iridium.

The stronger the spark the faster and better the flame front and flame speed giving smother higher RPM range in engines. 

The BRISK Silver Racing spark plug works well with most aftermarket and OEM ignition systems form simple coil and distributor through electronic ignition and powerful direct ignition systems found on modern port and direct injection performance engines.

Features

  • Fires properly even if fouling occurs, common standard plugs failure.

  • Silver centre electrode, best thermal (heat) & electrical conductor.

  • Lower voltage requirement for safe operation.

  • Reduces wear on coil, leads and other ignition parts.

  • 1.5 mm Silver Wire Centre Electrode

Applications

  • Methanol, ethanol, CNG, LPG, Propane, E85 blend, Alcohol, LNG, Race Fuels, Nitro, Nitrous.

  • Old vehicles with weaker ignition systems and/or excessive oil consumption.

  • High RPM race engines with short time for ignition coil saturation.

  • Naturally aspirated or forced induction applications

  • Standard and high compression engines

  • High octane or hard ignition fuels.

Service Life

  • 15-18k miles

  • 50 hours racing

Brisk Silver Racing spark plugs have helped Tim Lynch and Steve Petty to keep the A/F mixture lit and set 4 New World Records since they started using them in their extreme 3,000+ HP 6.6sec @ 223.5mph Twin Turbo 10.5 Outlaw Mustang, and can do the same for you… but without the Mustang of course, HAHA.

Note; we sell these spark plugs individually, because when I purchase spark plugs I always keep 1-2 extra on the shelf just incase I have an issues one day, or I damage one… and I don’t want to order an entire set of 8. Anyway, that is why we sell them this way. That said, we do recommend ordering 1-2 extra for closet stock.

For Spark Plug gap, we always suggest you ask and follow your tuners advice. Don’t like your tuner? Then let me know and I will ask mine! For reference, I run a .024” gap on my 800+ rwhp car with great results. We also suggest using a small amount of anti-seize on the threads during install

OPTIONS; note we offer the RR14S which is 1-step colder than stock and the RR12S which is 2-steps colder. We recommend the RR14S plug between 550-750rwhp and then the RR12S for 750-1,000rwhp. For reference, I used the RR14S when I was at 660rwhp and switched to the RR12S after I was past 770rwhp based on my tuners recommendation.

Parameters:

  • ThreadDiameter - 14mm

  • Thread Reach - 25mm-1"

  • Hexagon - 16mm-5/8"

  • Seat Type - Tapered

  • Design - Silver Racing

  • Resistor - Yes

  • Projected - No

Fitment: 2017+ Camaro ZL1

TOOL TIPS;

THIS is the magnetic spark plug socket I like and THIS is the spark plug gap tool I use.

GRIPTEC LT4 Upper Pulley
from $175.00

Are you ready for more blower whine, stump pulling torque, and less belt slip? Then you should consider changing your upper pulley to a GRIPTEC.

The ZPE GripTEC pulley is considered the GOLD STANDARD for upper pulley design, thanks to it’s proprietary micro-machining technology, which maximizes grip force on the belt without damaging it, ensuring maximum performance while resisting belt slip much more than the OEM pulley. ZPE’s patented design also makes pulley changes super fast and easy if you want more or less boost in 20 minutes or less! Don’t know which pulley size to select? We suggest you talk with your tuner first, or email us at info@griffin-motorsports.com for assistance.

If you already have the ZPE hub pressed on, then changing the pulley size is easy, and you can purchase the pulley separate. If not, it’s best to have the hub pressed on while the blower is getting ported. Check out our KONG X-PORT packages for maximum savings on that service.

The Ultra Lightweight ZPE 10-bolt Hub and pulley combo is precision-crafted from billet 7075-T6 aerospace-grade aluminum, treated with a sexy black anodized finish and will not only help you make more power, but it looks great under the hood while doing so.

Fitment: All OEM 1.7L Eaton blowers with an 8-Rib set up found on all 2017+ Camaro ZL1 / 2016+ CTS.V / 2022+ CT5-V Blackwings / 2015+ Z06

Ready to UPGRADE from the wimpy 8rib to a 10rib? Read more about the advantages HERE.

Products may ship direct from ZPE depending on inventory on hand.

(NOTE) all upper pulleys smaller than 2.3” will require snout modifications.

10 RIB Supercharger Belt Drive Package
from $1,285.00

As you may be finding out, belt slip on a modified LT4 can still occur even when using all of the best parts available (ZPE Griptec upper pulley, Larger lower pulley, and the Gates HD Green Belts) This is exactly the issue I had, even after replacing my upper pulley and a fresh green belt. With only 770rwhp, I was still seeing alot of boost drop and belt slip on my HPT datalogs.

The solution? For our power level we looked no further than our friends at Too High PSI for their elegant turn-key 10 rib solution. We take that one step farther by offering several options for a 10-rib Upper Griptec Pulley to make this kit as complete as possible.

So, why do I need a 10 Rib? It’s starts with the simple fact that a 10-rib belt provides 25% more contact area and belt strength than the factory 8-rib found on all LT4’s. Add to that the 30% more belt tension and 12% more belt length take-up that the LT5 tensioner provides and it’s clear to see why this is a winning combination for higher HP builds.

Keep in mind, despite the LT5 only making 100hp more than the LT4, GM realized even that small of a bump in HP/TQ not only required 30% more belt tension, but it required an 11-rib belt which also provided 37% more belt surface area to prevent slipping. That context alone should help us understand why so many LT4 owners with even light mods are already experiencing belt slip with the LT4’s 8-rib system.

Luckily, the solution is pretty straight foward, and one that has already passed through the brain trust with our friends at Too High PSI. They have already created the perfect billet adapter bracket for the Camaro/CTSV LT1/LT4 users, allowing us to bolt the OEM LT5 Tensioner with no fuss, onto a stronger than OEM bracket. Add in some slick black anodized idler pulleys, and two beefy lower pulley options and it doesn’t take long to see why this is the best 10-rib offering for your LT4 powered vehicle. The Too High PSI Supercharger 10-rib package is not only a work of art, but it ensures your supercharger maintains full boost throughout your entire run - giving you the competitive edge you need, to keep all that power where it belongs… the pavement.

We think this is a great option for most builds over 850rwhp. (which is why we added this to our shop car)

The TooHighPsi 10 Rib Package + LT5 Tensioner offers:

  • Up to 20% more belt length take-up (travel) than stock bracket. 

  • 48% larger tensioner shaft and bearings for robust belt control. 

  • (2) 6061 billet 10 rib idlers with high speed double row bearings.

  • (1) smooth 6061 billet idler with high speed double row bearing.

  • Beautiful machined billet finish to match other accessories.

  • Stiffer bracket design for higher HP builds.

  • 12% more belt length take-up (travel).

  • 25% more belt traction.

  • Improved aesthetics.

The ZPE GripTEC pulley is considered the GOLD STANDARD for upper pulley design, thanks to it’s proprietary micro-machining technology, which maximizes grip force on the belt without damaging it, ensuring maximum performance while resisting belt slip much more than the OEM pulley. ZPE’s patented design also makes pulley changes super fast and easy if you want more or less boost in 20 minutes or less! Don’t know which pulley size to select? We suggest you talk with your tuner first, or email us at info@griffin-motorsports.com for assistance.

If you already have the ZPE hub pressed on, then changing the pulley size is easy, and you can purchase the pulley separate. If not, it’s best to have the hub pressed on while the blower is getting ported. Check out our KONG X-PORT packages for maximum savings on that service.

The Ultra Lightweight ZPE 10-bolt Hub and pulley combo is precision-crafted from billet 7075-T6 aerospace-grade aluminum, treated with a sexy black anodized finish and will not only help you make more power, but it looks great under the hood while doing so.

Next steps; lets discuss the options…

OPTION.1 - Lower Pulley Size.

Choose from the 9.2” lower pulley that provides a 15% overdrive, or the larger 10” option that provides a 28% option. Note; the larger 10” option requires the sway bar drop brackets to avoid physical contact. This option is automatically priced into the larger 10” option.

OPTION.2 - Upper Pulley Option.

Choose an LT4 size between 2.175” (15% OD) or the 2.25” (11% OD) or the 2.3” (8.7% OD) or the 2.4” (4.15% OD) or the 2.5” OEM Size Upper LT4 Pulley (no cost difference between the LT4 options) Also, if you have a 2650, upper pulley costs are the same. Choose between a 2.6” (25% OD), 2.7” (23% OD), 2.8” (20% OD), 2.9” (18% OD), 3.0” (15% OD), 3.3” (6% OD), or the 3.5” Standard 90mm size. Just know some of those are a 5-6 days build times from ZPE. (NOTE) all upper pulleys smaller than 2.3” will require snout modifications.

OPTION.3 - Upper Pulley Hub.

This option is for folks who still have the OEM upper pulley. The ZPE billet hub is required to install the Griptec upper pulley.

Fitment: All LT4 Camaros + CTS.V’s + LT1 users who have upgraded to the LT4 supercharger. Any questions? email us at info@griffin-motorsports.com

What you need to provide; Gates HD 10-rib belt (note our upgrade required a belt that was approximately. 1” longer than the 8-rib set up with the same sized pulleys), and an ATI damper for the lower pulley. Don’t have one? We got you covered. You can ADD THIS ONE to the cart for the perfect fit.

Product may ship direct from Too High PSI depending on stock on hand.

10 RIB Supercharger Belt Drive Package
from $1,285.00

As you may be finding out, belt slip on a modified LT4 can still occur even when using all of the best parts available (ZPE Griptec upper pulley, Larger lower pulley, and the Gates HD Green Belts) This is exactly the issue I had, even after replacing my upper pulley and a fresh green belt. With only 770rwhp, I was still seeing alot of boost drop and belt slip on my HPT datalogs.

The solution? For our power level we looked no further than our friends at Too High PSI for their elegant turn-key 10 rib solution. We take that one step farther by offering several options for a 10-rib Upper Griptec Pulley to make this kit as complete as possible.

So, why do I need a 10 Rib? It’s starts with the simple fact that a 10-rib belt provides 25% more contact area and belt strength than the factory 8-rib found on all LT4’s. Add to that the 30% more belt tension and 12% more belt length take-up that the LT5 tensioner provides and it’s clear to see why this is a winning combination for higher HP builds.

Keep in mind, despite the LT5 only making 100hp more than the LT4, GM realized even that small of a bump in HP/TQ not only required 30% more belt tension, but it required an 11-rib belt which also provided 37% more belt surface area to prevent slipping. That context alone should help us understand why so many LT4 owners with even light mods are already experiencing belt slip with the LT4’s 8-rib system.

Luckily, the solution is pretty straight foward, and one that has already passed through the brain trust with our friends at Too High PSI. They have already created the perfect billet adapter bracket for the Camaro/CTSV LT1/LT4 users, allowing us to bolt the OEM LT5 Tensioner with no fuss, onto a stronger than OEM bracket. Add in some slick black anodized idler pulleys, and two beefy lower pulley options and it doesn’t take long to see why this is the best 10-rib offering for your LT4 powered vehicle. The Too High PSI Supercharger 10-rib package is not only a work of art, but it ensures your supercharger maintains full boost throughout your entire run - giving you the competitive edge you need, to keep all that power where it belongs… the pavement.

We think this is a great option for most builds over 850rwhp. (which is why we added this to our shop car)

The TooHighPsi 10 Rib Package + LT5 Tensioner offers:

  • Up to 20% more belt length take-up (travel) than stock bracket. 

  • 48% larger tensioner shaft and bearings for robust belt control. 

  • (2) 6061 billet 10 rib idlers with high speed double row bearings.

  • (1) smooth 6061 billet idler with high speed double row bearing.

  • Beautiful machined billet finish to match other accessories.

  • Stiffer bracket design for higher HP builds.

  • 12% more belt length take-up (travel).

  • 25% more belt traction.

  • Improved aesthetics.

The ZPE GripTEC pulley is considered the GOLD STANDARD for upper pulley design, thanks to it’s proprietary micro-machining technology, which maximizes grip force on the belt without damaging it, ensuring maximum performance while resisting belt slip much more than the OEM pulley. ZPE’s patented design also makes pulley changes super fast and easy if you want more or less boost in 20 minutes or less! Don’t know which pulley size to select? We suggest you talk with your tuner first, or email us at info@griffin-motorsports.com for assistance.

If you already have the ZPE hub pressed on, then changing the pulley size is easy, and you can purchase the pulley separate. If not, it’s best to have the hub pressed on while the blower is getting ported. Check out our KONG X-PORT packages for maximum savings on that service.

The Ultra Lightweight ZPE 10-bolt Hub and pulley combo is precision-crafted from billet 7075-T6 aerospace-grade aluminum, treated with a sexy black anodized finish and will not only help you make more power, but it looks great under the hood while doing so.

Next steps; lets discuss the options…

OPTION.1 - Lower Pulley Size.

Choose from the 9.2” lower pulley that provides a 15% overdrive, or the larger 10” option that provides a 28% option. Note; the larger 10” option requires the sway bar drop brackets to avoid physical contact. This option is automatically priced into the larger 10” option.

OPTION.2 - Upper Pulley Option.

Choose an LT4 size between 2.175” (15% OD) or the 2.25” (11% OD) or the 2.3” (8.7% OD) or the 2.4” (4.15% OD) or the 2.5” OEM Size Upper LT4 Pulley (no cost difference between the LT4 options) Also, if you have a 2650, upper pulley costs are the same. Choose between a 2.6” (25% OD), 2.7” (23% OD), 2.8” (20% OD), 2.9” (18% OD), 3.0” (15% OD), 3.3” (6% OD), or the 3.5” Standard 90mm size. Just know some of those are a 5-6 days build times from ZPE. (NOTE) all upper pulleys smaller than 2.3” will require snout modifications.

OPTION.3 - Upper Pulley Hub.

This option is for folks who still have the OEM upper pulley. The ZPE billet hub is required to install the Griptec upper pulley.

Fitment: All LT4 Camaros + CTS.V’s + LT1 users who have upgraded to the LT4 supercharger. Any questions? email us at info@griffin-motorsports.com

What you need to provide; Gates HD 10-rib belt (note our upgrade required a belt that was approximately. 1” longer than the 8-rib set up with the same sized pulleys), and an ATI damper for the lower pulley. Don’t have one? We got you covered. You can ADD THIS ONE to the cart for the perfect fit.

Product may ship direct from Too High PSI depending on stock on hand.

Why ZL1 Performance Parts Matter

ZL1 performance parts are not just about adding horsepower. They represent a mindset, a refusal to accept factory limits as the final word. When every component is chosen with intent, the result is a machine that performs with clarity and purpose. Here's how these parts truly make a difference:

Pushing Beyond Stock Limits

From the factory, the Camaro ZL1 is built to impress. But mass production means compromises. OEM setups leave room for improvement in performance, cooling, and handling. Performance parts help close that gap and push the car to where it should have been all along.

Driving Feel Over Dyno Sheets

Power numbers are one thing. Real engagement comes from how the car feels in motion. Stiffer chassis components, improved suspension geometry, and aerodynamic upgrades work together to provide better balance, sharper feedback, and a more controlled response in every condition.

System-Level Performance Gains

A single mod rarely changes the full experience. It’s the relationship between upgrades that transforms the drive. When cooling, airflow, stiffness, and power delivery are tuned as a system, the ZL1 becomes far more than just fast; it becomes precise.

Purpose-Built By Enthusiasts

Griffin Motorsports doesn't design for a market trend. We build parts to solve real-world problems we’ve faced ourselves. Our catalog reflects what we’ve tested, refined, and trusted on our own ZL1 builds. That’s the difference; it’s not about selling parts, it's about building better cars.

Griffin Motorsports: Born To Build For The ZL1

We didn’t get into this to chase volume. We started building for the ZL1 because we wanted parts that didn’t exist, not flashy bolt-ons, but real upgrades that solved real problems. Every Griffin Motorsports part is rooted in the same goal: to improve the car in ways that matter. Here's where that mission comes from:

A Platform That Deserves More

The ZL1 offers one of the most capable platforms GM has ever built. However, from airflow to rigidity, we identified opportunities to improve it. Instead of waiting for someone else to make what we needed, we designed it ourselves. That’s how the first Griffin crash bar came to life.

Engineered In The Garage, Proven On The Street

We don’t sit in a boardroom guessing what drivers want. We wrench, we race, and we listen. Our parts are shaped by late nights in the shop and real-world testing, not just CAD models and simulations. We create what we would want in our own cars, then refine it until it works better than expected.

More Than A Product, It's A Mindset

This isn’t just about selling hardware. It’s about pushing a platform you already love. We obsess over the little things: fitment, finish, airflow, stiffness. If it doesn't improve the ZL1, it doesn't make it into our catalog. Griffin Motorsports builds for people who expect more from their machines, because that’s who we are, too.

Core ZL1 Performance Upgrades That Set You Apart

Not all upgrades are created equal. Some add style. Others add numbers. The best ones change how your ZL1 feels from the driver's seat. At Griffin Motorsports, we focus on the parts that make the most impact, both in performance and in presence. These are the core upgrades that set serious builds apart:

Crash Bars That Do More Than Save Weight

Our lightweight crash bars don’t just shed unnecessary mass. They improve airflow to critical cooling components while maintaining a clean, aggressive look. They’re engineered to bolt up cleanly, align without struggle, and complement factory mounting points. It's a smarter solution than hollowed-out factory parts or generic imports.

Chassis Bracing That Changes The Drive

The ZL1 has power, but that power is only as useful as the platform it sits on. Griffin’s chassis bracing components are designed to reduce flex and tighten response without harshness. You feel it in every corner. Turn-in sharpens. Mid-corner stability improves. The car feels planted without feeling punished.

Cooling Solutions That Keep Power Consistent

Heat kills performance. We design products that improve cooling efficiency without cluttering the engine bay or fighting with OEM routing. Whether it’s increased airflow from a crash bar design or improved clearance for intercoolers, our upgrades help you maintain consistent power, even in less-than-ideal conditions.

Fit, Finish, And Function

We don’t ship anything that doesn’t fit like a factory. That’s non-negotiable. Every part we offer is built with attention to weld quality, finish, and appearance once installed. You don’t have to choose between performance and clean presentation. Griffin Motorsports gives you both.

Precision Power: ZL1 Tuning Kits That Deliver

Power means nothing if it isn't controllable. That’s why tuning kits are one of the most critical upgrades you can make to your ZL1. But not all kits are built with the same priorities. Ours are built to match performance goals with precision and reliability. Here’s how we approach power the right way:

Built Around Real-World Performance Goals

Every ZL1 build has a different purpose. Some are chasing quarter-mile numbers. Others are built for track days or weekend cruises. Our tuning kits are designed to support various use cases, featuring configurations that strike a balance between boost, fueling, and cooling to deliver dependable power that you can actually utilize.

No Compromise On Supporting Mods

Adding power means adding strain to the entire system. We focus on the full equation, not just horsepower. That means including or supporting the right hardware for heat management, airflow, and structural reinforcement. The result is a powertrain that feels strong, pulls clean, and stays reliable under pressure.

Calibration That Matches The Hardware

The best hardware still needs the right calibration to unlock its full potential. That’s why our tuning kits are designed to work in sync with your ZL1’s ECU. No guesswork, no patchwork combinations. Griffin Motorsports gives you a matched setup that feels cohesive from the first pull.

Performance Accessories That Actually Perform

Accessories should do more than look good. They should solve problems, improve functionality, and fit as if they came from the factory. At Griffin Motorsports, every accessory we offer serves a purpose, whether it's refining airflow, enhancing aesthetics, or improving installation quality. Here's how we think about performance accessories:

Aesthetic Upgrades That Compliment The Build

Appearance matters, but only when it aligns with performance. Our visual upgrades are designed to enhance the ZL1's aggressive factory lines without feeling forced or overstated. Materials, finish, and fitment are carefully chosen, so the result appears intentional, not like an afterthought.

Function-Forward Design

Many accessories available are simply decorative trim pieces. Ours are different. Each one is developed to address a real need, improve airflow, better mounting geometry, or cleaner integration with performance parts. If it doesn’t improve the car’s form or function, it doesn’t make it into our lineup.

Made To Work, Not Just To Sell

Griffin Motorsports builds for people who drive their cars hard and expect every part to deliver. Our accessories are tested to withstand real-world use, not just stand out at a meet. That mindset is why builders trust our components to finish off a ZL1 the right way.

What Makes Our ZL1 Mods Different

There are plenty of companies selling parts. Fewer are building them with the level of intent we bring to every Griffin Motorsports product. We don't release a component unless it solves a real issue, fits perfectly, and adds value to the ZL1 platform in a meaningful way. Here’s what sets our mods apart:

Designed With Purpose, Not Hype

We don’t chase trends or drop products just to fill a catalog. If we make it, it's because we needed it ourselves. That approach keeps the focus on performance, durability, and quality. Our customers don’t need marketing gimmicks; they need results.

Oem-Level Fitment With Aftermarket Advantage

Sloppy fitment kills a good build. That’s why we test every part on real cars, refine the details, and make sure it installs cleanly. Our mods are built to match or exceed factory tolerances, while delivering performance gains that the stock setup never offered.

Built By Enthusiasts, Backed By Experience

We’re not outsiders looking to cash in on the platform. We live in it. We race, we build, and we drive the ZL1 ourselves. That first-hand experience influences everything we create. When you order from Griffin Motorsports, you're buying from people who speak the same language you do, car people.

Upgrade With Griffin Motorsports

Upgrading your ZL1 shouldn't feel like a gamble. When you choose Griffin Motorsports, you’re getting more than a part; you're getting a product developed by people who build, drive, and trust the same platform you do. Every component is the result of hands-on testing, refinement, and real-world performance feedback.

We know what it's like to spend hours in the garage chasing a better fit, better cooling, or a cleaner installation. That’s why we obsess over the details before anything ever reaches your hands. From chassis upgrades to cooling solutions and visual accessories, every Griffin Motorsports part is made to fit right and function better than stock.

If you're looking for ZL1 performance parts that actually deliver, Griffin Motorsports is ready to support your build with parts that work as hard as you do.

Frequently Asked Questions About ZL1 Performance Parts

  • The most common starting point is usually an intake or exhaust system, since both offer measurable gains in airflow and sound without a major teardown.

  • Yes, some upgrades can impact your warranty. It's best to check with your dealership and review the Magnuson-Moss Warranty Act for specifics.

  • Always check the product listing for CARB certification or local compliance notes. Some high-output mods are for off-road or competition use only.

  • Most bolt-on parts require basic hand tools: torque wrench, socket set, jack stands, and panel removal tools. Advanced installs may need specialty tools.

  • Yes. Transmission cooling, tuning kits, and some driveline parts can differ between manual and automatic ZL1s, so verify compatibility before purchase.

  • You can use remote tuning or plug-and-play modules, but most serious builds require reprogramming the ECU. Always work with a tuner familiar with GM platforms.

  • High-quality, well-installed parts from trusted brands like Griffin Motorsports can add value, especially for buyers looking for performance-ready vehicles.

  • Check upgraded parts every oil change. Look for wear, heat fatigue, and bolt torque, especially on suspension and chassis components.

  • If you're significantly increasing power, yes. Upgrading pads, fluid, or rotors will help balance performance and keep braking predictable under load.

  • Plan your build in stages. Don’t focus only on power. Add support mods like cooling, suspension, and chassis bracing to maintain overall driveability.