alright, im going to be changing my plugs and im currently running ngk tr5 and want to get something else like coppers or something. What 2 stages colder number am i looking for?
NGK TR7 IX stock # 3690
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
