High Flow LT4 Fuel Injectors For 6Th Gen Camaro

The Camaro ZL1 Heat Extraction Hood Bracket plays an important role in securing and supporting the hood's heat extractor assembly while helping maintain proper airflow through the engine bay. Whether you're replacing a damaged factory bracket, restoring your ZL1 to OEM condition, or upgrading components during a hood modification project, choosing the right bracket ensures proper fitment, durability, and long-term performance.

XDI 50+ High Flow Injectors XDI 50+ High Flow Injectors XDI 50+ High Flow Injectors
Sale
XDI 50+ High Flow Injectors
from $2,895.00

BREAKING NEWS: GMS is now offering FREE SHIPPING with every order of XDI Fuel Injectors!

Just another way GMS is showing its dedication to helping every 6th Gen. Camaro reach it's full potential, in order to leave as many Mustangs and Hellcats in their dust.

As you know, High-Flowing Fuel Injectors are a major component to High HP builds on a Direct Injected platform like the LT4. Although there are several manufactures to choose from, you can always count on Griffin-Motorsports carrying the highest quality and most trusted products on the market. Which is why we only offer XDI Fuel Injectors. Built upon the foundation of the original GM LT4 injector, they provide a straightforward drop-in installation with minimal adjustments to existing ECU injector characteristics. Each injector undergoes meticulous testing at 100bar and 200bar on OEM equipment at XDI, ensuring precise flow matching within ±0.5% for consistent performance. Tested on fully instrumented engines for superior cylinder distribution and stability at pressures up to 3000psi, these injectors are fully E85 compatible, making them a versatile choice for performance enthusiasts.

For those who may not know… XDI’s success on many DI platforms could not have been possible without its founder, Uwe Ostmann’s 25 extensive years in motorsports and DI development. Uwe’s journey started in 2001 when he joined the talented team at Bosch Germany in August 2001. Use spent many of those early years developing Diesel High Pressure Nozzles and overcame many challenges related to tuning a common rail based high pressure fuel system.

After leading the Audi Le Mans LMP1 project for four years including fuel system and controls development and developing several key technologies at Bosch Motorsport in Germany, Uwe came to Bosch Motorsport USA in July 2012.

With Uwe’s talent and determination it didn’t take long before he took over the fuel system development of all OEM race projects based on GDI systems, including the Corvette C7.R, the Ford Daytona Prototype 3.5 EcoBoost and some others that cannot be mentioned in detail. He played a vital role in developing advanced combustion analysis systems and custom fuel systems and controls for several research projects with high pressure fuel systems up to 500bar / 7250psi.

In December 2014 Uwe quit Bosch Motorsport to create XDI. The first and only Bosch Motorsport Dealer and aftermarket supplier in the world with focus on high pressure GDI race projects. Since then Uwe has continued to grow XDI’s technology, effectiveness, and product line to not only support several race programs, on wheels and on water, endurance, drift and drag… but even more importantly… your street car!

Specifications

  • Static Flow Rate: 26.6 g/sec (2300cc/min @ 100bar)

    • 73% more flow than production LT1/L86 injectors (15.3 g/sec)

    • 50% more flow than production LT4 injectors (17.7 g/sec)

  • Max Rail Pressure: 221 bar / 3000 psi

  • Fuel Compatibility: all known fuels, all Ethanol blends

  • Electric Connector: Bosch EV1

  • Driver Profile: XDI, tuning changes needed

  • Tuning Support:  Standalone, HPT, MoTeC

  • Idle Stability: 0.8 ms at 20 bar

  • Static Flow Reference: 10 ms at 100 bar

  • WOT Performance and Stability: 6 ms at 200 bar

  • Tuning Support: Compatible with HP Tuners and standalone ECUs

Requirements

  • Fuel System Upgrades: In order to get the most from these injectors, we suggest an upgraded low-pressure and high-pressure fuel pumps to reach the full potential of these injectors.

Power Potential and Recommended Combinations (LT4 +50%)

Applications

•High horsepower GM Gen V V8 and V6 direct injection engines including LT4, LT1, L86, L83 and LV3
•E85 conversions of GM Gen V V8 and V6 engines
•2014-2019 C7 Corvette (LT1)
•2015-2019 C7 Z06 Corvette (LT4)
•2016-2022 Camaro SS (LT1)
•2016-2019 CTS-V (LT4)
•2020-2024 CT5-V Black Wing (LT4)
•2017-2023 ZL1 Camaro (LT4)
•2014-2023 Silverado and Sierra with 4.3L LV3, 5.3L L83 and 6.2L L86 engines Not compatible with 6mm shaft injectors
•2015-2023 Suburban, Tahoe, Yukon and Escalade with 5.3L L83 and 6.2L L86 engines Not compatible with 6mm shaft injector

*Global B ECUs may require extra tuning on a case-by-case basis as we learn more about new models. We do not accept returns due to tuning difficulties, but we’re happy to assist with any technical inquiries.

All performance figures are estimates only, assume a fully supported setup, and competent tuner who has experience tuning XDI products. Your results will vary. Final rail pressure should be determined by your tuner. Injectors are non-returnable.

Product may ship direct from XDI.

What YOU will need to provide:

  • Patience and attention to detail for installation... or, someone like that, who you trust with your beloved, adorned, magnificent, earth shaking, alarm sounding LT4 powered beast! If you are doing this DIY (which is not that bad) be sure to get an extra set of hands. These superchargers are alot heavier than some imagine.

  • We strongly suggest upgrading your cooling system while the blower is out of the car because alot of the labor needed to upgrade is already done with the coolant system bleed and blower out of the car. Email us at info@griffin-motorsports.com to discuss your particular set up if you need help, or want to discuss options.

  • Although many people have had luck reusing the GM supercharger bolts, Fuel Feed Pipe, and Fuel Crossover Pipe, we strongly suggest you add these items to your cart, as these are ALL one time use only parts.

  • This package will require tuning. Email us at info@griffin-motorsports.com if you need a recommendation for a remote tuner.

XDI 50+ High Flow Injectors

As you know, High-Flowing Fuel Injectors are a major component to High HP builds on a Direct Injected platform like the LT4. Although there are several manufactures to choose from, you can always count on Griffin-Motorsports carrying the highest quality and most trusted products on the market. Which is why we only offer XDI Fuel Injectors. Built upon the foundation of the original GM LT4 injector, they provide a straightforward drop-in installation with minimal adjustments to existing ECU injector characteristics. Each injector undergoes meticulous testing at 100bar and 200bar on OEM equipment at XDI, ensuring precise flow matching within ±0.5% for consistent performance. Tested on fully instrumented engines for superior cylinder distribution and stability at pressures up to 3000psi, these injectors are fully E85 compatible, making them a versatile choice for performance enthusiasts.

CLICK HERE TO READ MORE...

from $2,895.00

CLICK HERE TO SHOP ALL PRODUCTS

XDI High Flow Injectors for LT1 & LT4: Solving the Fueling Limits of the Direct Injection Platform

Modern GM LT engines are incredibly capable.

The LT1 and LT4 platforms respond exceptionally well to:

  • Boost

  • Camshaft upgrades

  • Ethanol blends

  • Ported blowers

  • Larger superchargers

But as horsepower increases, one system becomes the limiting factor very quickly:

Fuel delivery.

And on direct injection LT engines, the injectors are one of the most critical parts of the entire fuel system.

Because unlike traditional port injection setups, direct injection injectors must:

  • Operate at extremely high pressure

  • Deliver fuel in extremely short injection windows

  • Maintain precise atomization under massive cylinder pressure

Once injector capacity is exceeded, the engine becomes unstable very quickly.

That’s where XDI High Flow Injectors come in.

The Problem with OEM LT Injectors

The OEM LT1 and LT4 injectors were designed around factory airflow and power levels.

They work well on stock applications.

But once you add:

  • More boost

  • More power

  • Ethanol blends

Fuel demand rises dramatically.

Eventually the injectors can no longer:

  • Deliver enough fuel volume

  • Maintain proper pulse width control

  • Support safe air/fuel ratios at high load

The result:

  • Lean conditions

  • Fuel pressure instability

  • Reduced timing

  • Inconsistent power

  • Increased knock sensitivity

And once injector duty cycle becomes excessive, tuning safety margins disappear quickly.

Why Direct Injection Fueling Is So Difficult

Direct injection systems operate very differently than traditional port injection systems.

On LT engines:

  • Fuel is injected directly into the combustion chamber

  • Injection occurs under extremely high pressure

  • Injection timing windows are extremely short at high RPM

That means injectors must:

  • Deliver enormous fuel volume quickly

  • Maintain proper atomization

  • Remain stable under extreme pressure and heat

This becomes especially difficult on:

  • High RPM combinations

  • Ethanol builds

  • Large boost applications

Why Ethanol Changes Everything

E85 and ethanol blends are excellent for:

  • Knock resistance

  • Intake charge cooling

  • Power potential

But ethanol requires significantly more fuel volume than gasoline.

Typically:

  • E85 requires roughly 30% more fuel volume compared to gasoline

That means injector demand increases dramatically.

This is why many modified LT builds run out of injector long before owners expect.

The Solution: XDI High Flow Injectors

XDI injectors are engineered specifically for high-performance direct injection applications.

Rather than relying on questionable modified OEM injectors, XDI develops injectors designed around:

  • Increased flow capability

  • Proper spray pattern behavior

  • High-pressure stability

  • Direct compatibility with LT platforms

Available options include:

  • XDI 30% injectors

  • XDI 50% injectors

  • XDI 70% injectors

Each designed to support progressively higher horsepower and fuel demand.

Understanding Injector “Over” Ratings

When an injector is labeled:

  • 30 over

  • 50 over

  • 70 over

That refers to the approximate increase in fuel flow capability over OEM injector capacity.

Example:

A 50% over injector is capable of delivering substantially more fuel volume than the factory LT1 injector under equivalent operating conditions.

This allows the fuel system to:

  • Support more airflow

  • Support more boost

  • Support ethanol blends more effectively

XDI 30% Injectors

Best suited for:

  • Mild bolt-on combinations

  • Lower boost setups

  • Moderate ethanol blends

Ideal for:

  • Pulley upgrades

  • Headers and cam combinations

  • Street-focused performance builds

These provide additional fueling headroom while maintaining excellent drivability characteristics.

XDI 50% Injectors

This is one of the most popular options for serious LT4 builds.

Best suited for:

  • Ported blower combinations

  • Larger superchargers

  • Aggressive ethanol use

  • High horsepower street cars

The 50 over injectors offer a strong balance between:

  • Fueling capacity

  • Tuning flexibility

  • Street drivability

This is often the sweet spot for many 800–1,000+ horsepower combinations depending on fuel type and overall setup.

XDI 70% Injectors

Designed for:

  • Extreme horsepower applications

  • Heavy ethanol use

  • Large blower and turbo combinations

Best suited for:

  • Competition builds

  • Maximum airflow combinations

  • Advanced fueling systems

At this level:

  • Fuel demand becomes enormous

  • Injector stability becomes critical

  • Proper calibration becomes absolutely mandatory

CLICK HERE TO SHOP ALL PRODUCTS

Why Injector Spray Pattern Matters

One of the biggest misconceptions in fueling is assuming:

“More flow is all that matters.”

It isn’t.

Injector spray pattern and atomization quality are critical.

Poor atomization creates:

  • Uneven combustion

  • Reduced efficiency

  • Increased knock sensitivity

  • Cylinder imbalance

XDI injectors are designed to maintain proper spray behavior under extreme direct injection pressure conditions.

That matters tremendously for:

  • Combustion quality

  • Power consistency

  • Reliability

Why Proper Calibration Is Critical

Injectors are not plug-and-play horsepower parts.

When injector size changes:

  • Fuel modeling changes

  • Injector timing changes

  • Short pulse behavior changes

  • Air/fuel calculations change

Without proper calibration:

  • The car may idle poorly

  • Drivability may suffer

  • Fuel trims may become unstable

This is why proper tuning is absolutely critical when upgrading injectors.

Why Bigger Isn’t Always Better

Many people assume they should simply buy the largest injector available.

But oversized injectors can:

  • Reduce tuning resolution at lower load

  • Complicate drivability

  • Increase calibration complexity

The goal is:

  • Proper injector sizing for the application

Not simply maximum injector size.

That’s why selecting the correct injector for your horsepower goals matters.

The Relationship Between HPFP and Injector Capacity

Injectors and the high-pressure fuel pump work together.

Even large injectors cannot perform correctly if:

  • Rail pressure falls

  • The HPFP cannot maintain pressure stability

This is why serious LT fueling systems often combine:

  • XDI injectors
    with

  • Upgraded high-pressure fuel pumps like the Stanadyne / XDI RGX HPFP

Together, they create a complete high-performance direct injection fuel system.

What Happens When Injector Capacity Is Exceeded

This is where engines get damaged.

Once injectors run out of capacity:

  • Air/fuel ratios become unstable

  • Fuel delivery falls behind airflow demand

  • Cylinder temperatures rise

  • Knock sensitivity increases

The tuner is forced to:

  • Reduce timing

  • Reduce boost

  • Add safety margins

Or risk catastrophic engine damage.

Why Buying the Correct Fueling Components Matters

Fueling is one of the most expensive areas to get wrong.

Cheap or poorly engineered injectors can create:

  • Spray pattern issues

  • Calibration instability

  • Inconsistent fueling behavior

  • Reliability concerns

The difference between:

  • A stable 1,000 horsepower build
    and

  • An unstable one

Often comes down to fuel system quality.

Why Buy from Griffin Motorsports

You’re not just buying injectors.

You’re getting:

  • Real LT platform experience

  • Guidance based on actual combinations

  • Proper system recommendations

  • Access to proven fueling solutions

Every setup is different.

The correct injector depends on:

  • Horsepower goals

  • Fuel type

  • Boost level

  • Camshaft

  • Overall fuel system configuration

This is why system-based guidance matters.

Who Needs XDI High Flow Injectors?

If your Camaro has:

  • Ethanol blends

  • Increased boost

  • Ported blower

  • Larger supercharger

  • Camshaft upgrades

  • High horsepower goals

You should strongly evaluate injector capacity before pushing the limits of the OEM system.

The more airflow your engine moves, the more fuel delivery matters.

Final Thoughts

Modern LT engines are capable of incredible power—but fueling limitations appear quickly as modifications increase.

XDI High Flow Injectors help solve one of the biggest bottlenecks in the direct injection system by providing:

  • Increased fuel flow capacity

  • Proper atomization

  • High-pressure stability

  • Improved fueling headroom

Because making power safely is not just about airflow.

It’s about delivering enough fuel to support it consistently.

CLICK HERE TO SHOP ALL PRODUCTS

Frequently Asked Questions About XDI High Flow Injectors

  • Performance direct injection injectors designed for high horsepower LT engine applications.

  • It refers to the approximate increase in fuel flow capability over OEM LT1 injectors.

  • Higher airflow and ethanol blends dramatically increase fuel demand.

  • Injection windows become extremely short while fuel demand increases significantly.

  • Yes. E85 requires substantially more fuel volume than gasoline.

  • The engine can run lean, lose power, and become more knock sensitive.

  • No. Injectors should be properly matched to the application.

  • Absolutely. Proper calibration is mandatory.

  • It refers to how fuel is atomized and distributed during injection.

  • Better atomization improves combustion quality and consistency.

  • Yes. They are commonly used in high-performance ethanol applications.

  • Often yes, especially on high horsepower builds.

  • That depends on horsepower goals, fuel type, and overall fuel system configuration.

  • Yes. Poor fueling consistency can create lean conditions and knock.

  • Because proper fueling requires more than parts—it requires understanding the entire LT fuel system as a complete package.