C5 dry question
75 ok with stock plugs (2000 miles) or not?
Now I just need to find me a window switch. <img src="images/icons/grin.gif" border="0">
150hp= tr6
This should work great.Now you obviously need to be using supreme with 75-100hp and 100 octane with 150hp. The biggest problem with the stock plugs are they are platinum and hold heat to prevent fowling this causes detonation. The tr55 dont hold as much heat and wont cause the rough idle issues.

