Spark Plug Tube from Noonan Racing Engineering Billet Valve Cover , Large Hole, 6.915 Long
These small diameter spark plug tubes are designed to prevent Rocker Arm to tube contact effectively. They serve as direct replacements for your current tubes, featuring billet aluminum ends and a 4130 steel body. The steel construction ensures durability, capable of withstanding Rocker Arm rubbing without denting or wearing. With an outer diameter of 1.180 inches, these tubes provide an additional .040 inches of clearance. To use these tubes, a slight modification is necessary for the spark plug boot to fit into the tube. They are specifically engineered for compatibility with Billet Noonan Race Engineering Valve Covers (visual reference available at http://noonanrace.com/noonan-valve-covers/). Note: You'll need 8 tubes to complete a set.