The Accel Blue Supercoil Coil Packs (140670B-4) and Stock Heat Range Spark Plugs (578-4) are an excellent solution for 2013-2018 Focus STs and 2016-2018 Focus RSs without performance modifications. With these installed, you can maximize fuel economy, increase throttle response and achieve a cleaner idle all the way to redline.
Features and Benefits:
- Up to 15% Increase in Spark Energy
- Improved Throttle Response
- Maximizes Fuel Mileage
- Direct OEM Replacement Supercoil Coil Packs
- ODB II Compatible
- Stock Heat Range Spark Plugs for Cars w/o Performance Mods
- HP Copper Plugs are Gapable
- Set of 4 Blue Accel Supercoil Coil Packs (140670B-4)
- Set of 4 Accel Stock Heat Range Spark Plugs (578-4)
The Coil Packs and Spark Plugs offer an array of benefits, including an increase in spark energy up to 15 percent. The Coils are made using high-temperature vacuum applied epoxy that is shock and vibration resistant. They feature a direct OEM replacement coil-on plug design.
The included Accel HP Copper Core Spark Plugs feature a stock heat range. The C-cut design un-shrouds the spark for a better burn, while the copper core design allows for better conduction and heat dissipation. The threads are machined rolled for more precise thread engagement to your cylinder heads.
- 2013-2018 Focus ST
- 2016-2018 Focus RS
Tech Tip: This Kit is designed for a stock Focus ST or a stock Focus RS. For vehicles that are equipped with aftermarket parts that increase horsepower or an aftermarket calibration, please consider the other Accel kits with Blue Supercoil Coil Packs that include spark plugs that are One or Two Heat Ranges Colder for the 2013-2018 Focus ST or 2016-2018 Focus RS (CJ Pony Parts Numbers: SPCPK5 and SPCPK6).