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.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov