i have a 01 Z24 with the GM supercharger. Today was the first time i had changed my plugs since they kit was installed last september. They looked pretty nasty. The ends where white and the body of the plug had a brown discoloration to them. Almost looked like they were burned. The car was running just fine though. Anways how long do you guys wait before changing plugs?


2006 Black Cobalt SS Supercharged G85
13.91@102.77