Accel Coil Packs Supercoil Blue Set With One Heat Range Colder Spark Plugs Mustang EcoBoost 2015-2021

CJ's Part Number:


  • 15% Spark Energy Increase
  • Improved Throttle Response
  • Direct OEM Replacement Design
  • Includes Four (4) Spark Plugs
MSRP $246.06
You save 10%

Set of Accel Blue Supercoil Coil Packs with One (1) Heat Range Colder Spark Plugs for 2015, 2016, 2017, 2018, 2019, 2020 and 2021 EcoBoost Mustangs.

If you own a 2015-2021 EcoBoost Mustang and you are finally ready to give it that increase in spark energy that you've always wanted, then stick around! This Set of Accel Blue Supercoil Coil Packs with One (1) Heat Range Colder Spark Plugs is available today at CJ Pony Parts!

Accel Supercoil Coil Packs (140670B-4) Features and Benefits:
- Up to 15% Increase in Spark Energy
- Improved Throttle Response
- Shock and Vibration Resistant High-Temperature Vacuum Applied Epoxy
- Maximizes Fuel Mileage
- Direct OEM Replacement
- ODB II Compatible
- Sold as a Set of Four (4)
- Easy Installation

Accel Spark Plug (578C1-4) Features and Benefits:
- Set includes 4 total spark plugs
- One heat range colder for EcoBoost Mustangs with performance modifications
- Better conduction and heat dissipation through copper core
- C-cut design un-shrouds the spark for a better burn
- Machine rolled threads for precise thread engagement
- Gapable HP Copper plugs

These Blue Supercoil Coil Packs from Accel are made using high-temperature vacuum-applied epoxy that helps them to resist shock and vibration so they can increase your Mustang's spark energy by up to 15%! As direct fit, OEM-style replacements, they will easily plug right in and will instantly create an increase in throttle response with a cleaner idle. This also affords you a maximized fuel economy! Included with this set of coils are Accel HP Copper Core Spark Plugs that are one (1) heat range colder than normal. They also use C-cut design grounding straps and machine rolled threads that lead to a precise engagement.

Included in Kit:
- Set of 4 Blue Accel Supercoil Coil Packs (140670B-4)
- Set of 4 Accel 1 Heat Range Colder Spark Plugs (578C1-4)

Tech Tip: The included Accel HP Copper Core spark plugs are specifically for use in engines that are taking advantage of aftermarket parts or an aftermarket calibration that creates higher than stock cylinder combustion pressures or sustained high RPM. These upgraded, high-quality plugs are one heat range colder than the stock heat range 2015-2021 EcoBoost Mustangs spark plugs and ideal for forced induction or nitrous applications. For stock applications, please see CJ Pony Parts Number: SPCPK10 and for applications using added boost or alternative fuels (race gas), please see CJ Pony Parts Number: SPCPK12.

Vehicle Fitment:
- 2015-2021 EcoBoost Mustang

California Residents: Proposition 65 Warning

Only for use on pre-pollution controlled vehicles: This product can be used on vehicles that were manufactured before emissions control regulations were imposed. Pre-pollution vehicles are defined as:

  • 1965 and older U.S. manufactured California certified vehicles
  • 1967 and older U.S. manufactured federally certified vehicles

Vehicle Fitment

This product will fit the following Mustang years:

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