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 capable 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.

Product Features:

• The Copper core is a better conductor than Iridium or Platinum plugs
• Copper dissipates heat much better than other materials
• C - Cut Design un-shrouds the spark kernel for a better burn
• Unlike Iridium or Platinum plugs, the ACCEL HP plugs are capable
• Machine rolled threads for precise thread engagement
• Stock Heat Range
• Whether using on the street or on the strip, ACCEL HP Copper Core spark plugs deliver.