For the racer that has picked the dirt and mud as there choice of ground to race on these Hemi spark plug tube covers can come in very handy keeping debris out of the plug tube when you are wanting to remove the plug for some between round maintenance without dirt falling down into the engine.
The covers are made from black durable rubber and fit a variety of diameter plug wires buy simply trimming the end that the wire slides thru. Just slide one of these on when building your set of plug wires and adjust once it is on the motor. Plug wire covers are 2.125" dia. and should fit most Hemi plug tubes.