E3 Diamond Fire Spark Plug E3.70 AS05521 1977-1980 Pontiac Grand LeMans

1977-1980 Pontiac Grand LeMans

Adapter sleeve has an O

2003-2006 Cadillac Escalade ESV

Black anodized top hat

Left and Right

E3 Diamond Fire Spark Plug E3.70 AS05521 1977-1980 Pontiac Grand LeMansRace car drivers will tell you that the single sharp edge on spark plug electrodes wears out too fast for long term use. The E3 DiamondFire design presents multiple sharp edges to the circular sharp edge of the center electrode, which allows the spark to naturally seek the path of least resistance. The problem is that each time a spark jumps between two opposing spots of the electrode pair, the local resistance increases. After a few sparks, the local