NGK-6510 Spark plugs Ecoboost (set of 6) When adding aftermarket upgrades to your Ecoboost 3.5L F-150/Raptor truck a set of colder spark plugs is recommended to help improve performance and limit the chance of spark blow out. These NGK spark plugs are 1 heat range cooler than stock and... MSRP: Was: Now: $55.00
