Brisk Racing Iridium Spark Plugs

Brisk Racing Iridium Spark Plugs - Where Maximum Performance meets Maximum Service Life…

For enthusiasts building boosted street cars, spark plug selection is no longer just a maintenance item — it becomes a critical part of ignition stability, combustion efficiency, durability, and engine safety. Whether you are running a mildly modified daily driver or a high-boost street machine, choosing the correct plug design and heat range can make a major difference in consistency under load.

That is exactly where the new BRISK Iridium Performance Series plugs come in.

Unlike traditional OEM replacement plugs, the new BRISK RR Series Iridium plugs were engineered specifically for modern forced induction applications that see increased cylinder pressure, higher combustion temperatures, ethanol blends, upgraded superchargers/turbos, and aggressive tuning — while still maintaining the long-term durability and drivability many street-driven vehicles require.

Why Spark Plug Choice Matters on Forced Induction Engines

As boost pressure and cylinder pressure increase, the ignition system must work harder to fire the plug consistently under load. This becomes even more critical on modern direct injected engines like the Chevy LT1/LT4, Ford Coyote, Ford Ecoboost, and Dodge HEMI platforms.

Common symptoms of an inadequate spark plug can include:

• Spark blowout under boost

• Misfires at high RPM

• Inconsistent combustion

• Reduced power consistency

• Difficulty maintaining tight ignition control on ethanol blends

• Premature plug wear

• Increased sensitivity to heat soak

For lightly to heavily modified boosted applications, a purpose-built performance spark plug becomes cheap insurance.

BRISK Silver vs Iridium — Understanding the Difference

One of the biggest misconceptions in the performance industry is that one spark plug material is universally “better” than another. In reality, silver and iridium both serve important — but different — purposes.

BRISK Silver Racing Plugs

BRISK Silver Racing plugs have become extremely popular in high horsepower racing and aggressive boosted applications because silver is one of the most conductive electrode materials available. Benefits of silver plugs include:

• Exceptional electrical conductivity

• Extremely strong spark energy transfer

• Excellent resistance to detonation-related spark instability

• Outstanding performance in high cylinder pressure environments

• Preferred by many high horsepower race applications

The tradeoff is durability. Silver is softer than iridium, meaning silver plugs typically wear faster in daily driven applications, especially when subjected to long service intervals, frequent cold starts, stop-and-go traffic, and extended mileage use.

For dedicated race cars, aggressive E85 setups, and vehicles that are regularly serviced, silver plugs remain an outstanding choice.

BRISK Iridium Performance Plugs

The new BRISK Iridium Series was developed for enthusiasts who still want exceptional ignition performance, but with improved longevity and durability for real-world street driving. Benefits of iridium plugs include:

• Longer service life

• Improved electrode durability

• Better resistance to wear over extended mileage

• Excellent spark consistency

• Better suitability for daily driven boosted vehicles

• Greater resistance to erosion under continuous street use

BRISK combined the durability advantages of iridium with a copper-core center and ground electrode design to improve conductivity and heat dissipation — helping bridge the gap between racing performance and long-term street reliability.

The result is a plug that performs exceptionally well in modified boosted applications while requiring less frequent replacement than traditional racing-oriented silver plugs.

Additional Engineering Features of the BRISK Iridium Series

Beyond the iridium electrode itself, BRISK incorporated several important performance-focused design features into the RR Series:

Copper Core Electrodes - The center and ground electrodes utilize a copper core design to improve:

• Heat dissipation

• Thermal stability

• Electrical conductivity

• Spark consistency under load

This is especially important on boosted applications where combustion temperatures can rise rapidly during repeated pulls or aggressive driving.

Solid Insulator Body - The RR Series features a solid insulator body designed to reduce the occurrence of flash over and spark blowout under elevated cylinder pressures.

For higher boost applications, this added ignition stability can become extremely important.

Reinforced Internal Seal - BRISK also upgraded the internal sealing structure of these plugs to better withstand the elevated cylinder pressures modern boosted engines produce.

This increased sealing integrity improves long-term durability and reliability under aggressive tuning conditions.

BRISK RR14BYIR-7 Iridium Performance Spark Plug

Heat Range of 14, which is Ideal For:

• Mildly modified boosted applications

• Daily driven street cars

• Factory blower vehicles with increased boost

• Ethanol blend street applications

Popular Applications:

• Chevy LT1 / LT4

• Dodge 6.4L HEMI

• Ford 5.0 Coyote Gen 1-3

• Ford Ecoboost

Features:

• Pre-gapped at 0.028” (0.7mm)

• Projected tip design

• Copper core electrodes

• Iridium/Yttrium construction

• Resistor design

• Excellent drivability and durability

The RR14BYIR-7 serves as an excellent upgrade option for lightly modified street-driven forced induction vehicles looking for improved ignition consistency and long-term durability.

BRISK RR12BIR-6 Iridium Performance Spark Plug

Heat Range of 12, which is Ideal For:

• Moderately modified boosted applications

• Increased boost levels

• Camshaft and pulley combinations

• E85 street setups

• Higher cylinder pressure street cars

Features:

• Pre-gapped at 0.024” (0.6mm)

• Non-projected design

• Copper core electrodes

• Solid insulator body

• Reinforced internal sealing

• Excellent high-load durability

The RR12BIR-6 is designed for enthusiasts pushing beyond basic bolt-ons while still wanting excellent street manners and longer service intervals compared to traditional racing plugs.

BRISK RR10BIR-6 Iridium Performance Spark Plug

Heat Range of 10, which is Ideal For:

• Heavily modified boosted applications

• High boost street cars

• Aggressive ethanol combinations

• Large supercharger or turbocharger setups

• High cylinder pressure environments

Features:

• Pre-gapped at 0.024” (0.6mm)

• Non-projected design

• Iridium/Yttrium construction

• Copper core design

• Enhanced spark stability under extreme load

The RR10BIR-6 is targeted toward heavily modified street applications that still prioritize drivability and durability while operating at substantially increased power levels.

Why Griffin Motorsports Recommends BRISK

At Griffin Motorsports, we understand that no single spark plug is correct for every application. That is why we continue to support both BRISK Silver Racing plugs and the new BRISK Iridium Performance Series.

• Silver plugs remain an outstanding option for aggressive race-oriented combinations seeking maximum conductivity and peak ignition performance.

• The new Iridium Series offers an excellent solution for enthusiasts wanting improved longevity, reduced maintenance frequency, and excellent ignition stability in street-driven boosted vehicles.

Choosing the correct plug ultimately depends on:

• Boost level

• Fuel type

• Intended vehicle use

• Service interval expectations

• Ignition demands

• Tuning strategy

If you are unsure which BRISK plug is correct for your combination, Consult your tuner, or email us at info@griffin-motorsports.com so we can help guide you toward the proper heat range and configuration for your specific setup.

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 .022” gap on my 915 rwhp car with great results.

TOOL TIPS;

THIS is the magnetic spark plug socket I use.