ACCEL HP Copper Spark Plug ACC-18160C1

Ford 2004-Early 2008 Ford 3-Valve 4.6L,5.4L & 6.8L Modular Engines - One Step Colder than Stock - One Piece Design - 8 Pack of PN 346C1
ACCEL HP Spark Plugs are made with a Copper core which is a better conductor than Platinum and Iridium. They deliver a stronger spark especially in high performance applications where high combustion pressures are present. Copper is much better at dissipating heat than other materials which lessens the chance of a misfire. ACCEL HP Spark Plugs are gapable allowing you to open the gap exposing a larger flame kernel or close it if needed for high boost applications. All ACCEL HP Spark Plugs have machine rolled threads allowing for a more precise thread engagement and torque retention.