Accel Spark Plug HP Copper Core Two Heat Ranges Colder Mustang EcoBoost 2015-23

If your 2015-2023 EcoBoost Mustang is using an aftermarket turbocharger, added boost, or alternative fuels while using a custom calibration, then it's time you got some new high-performance spark plugs too! Fortunately, CJ Pony Parts has just what you need: This Set of Accel HP Copper Core Two Heat Ranges Colder Spark Plugs!

Features and Benefits:
- Two Heat Ranges Colder than Stock
- Ideal for Engines with Aftermarket Turbochargers, Added Boost or Alternative Fuels Using a Custom Calibration
- Copper Core: Better Conductor Than Iridium or Platinum Plugs
- Copper Dissipates Heat Better
- "C"-Cut Design: Unshrouds Spark for Better Burn
- Gapable
- Machine-Rolled Threads for Precise Thread Engagement
- Sold as a Set of Four (4)

This Set of Accel (578C2-4) HP Copper Core Two Heat Ranges Colder Spark Plugs comes with 4 copper core spark plugs. Copper cores are better conductors than iridium or platinum plugs, and they dissipate heat better too! These spark plugs have a "C"-cut design that unshrouds the spark for a better burn, and they're gapable as well. Plus, they have machine-rolled threads for precise thread engagement.

Please Note: These Accel HP Copper Core spark plugs are specifically to be used in engines that are using aftermarket turbochargers, added boost, or alternative fuels while utilizing a custom calibration that creates higher than stock cylinder combustion pressures or sustained high rpm. These upgraded, high-quality plugs are two heat ranges colder than the stock 2015-2017 EcoBoost Mustang spark plugs. For stock applications, please see CJ Pony Parts # SP5784, and for applications using typical bolt-on parts and an off-the-shelf calibration, please see CJ Pony Parts # SP578C14.

Vehicle Fitment:
- 2015-2022 EcoBoost Mustang