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:

• For use with Black Coil Boot, OE Coil 3L3E or ACCEL 140033 or 140033-8
• One Piece Design - Won't break off in head during removal like two piece design
• Copper Core - Copper is a better conductor than Iridium or Platinum plugs
• Heat Dissipation - Copper dissipates Heat Much better than other materials
• C - Cut Design - un-shrouding the spark kernel
• See PN 346 for Single Spark Plug
• Gapable - Unlike Iridium or Platinum
• Machine Rolled Threads-Precise thread engagement