Hedman HTC Hedders - 65-82 Corvette Brisk Racing Spark Plugs 12 AN Male to 12

12 AN Male to 12 AN Male O-Ring

8 in Extended

1957-1994 Chevrolet Suburban

These bits drill a slightly larger diameter hole than a standard 1/8" or 3/16" drill bit

Two stage heat dissipating black finish

Hedman HTC Hedders - 65-82 Corvette Brisk Racing Spark Plugs 12 AN Male to 12Hedman Hedders HTC Coated Headers; 2" Tube Diameter; 3" Collector; Full Length Design The standard duty Hedman Hedders in this section come from the factory with an extremely durable, protective ceramic metallic coating. Hedman Hedders, pioneered the use of ceramic metallic coatings, back in the early 80's. Previously used exclusively in the aerospace industry, Hedman Hedders recognized it's potential for improving both the lifespan, and functionality