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.

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