2015-2017 Ecoboost Mustang Spark Plugs NGK-6510 2015-2017 Ecoboost Mustang Spark Plugs One degree colder plug that can withstand both stock and increased boost levels and drastically reduces the chance of spark blow out and detonation. Recommending for higher boost applications Set of 4 MSRP: Was: Now: $45.00
