TR55s...Huge difference!
02-21-2012, 08:41 AM
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TR55s...Huge difference! Ive had my Z28 for almost six months and i have done some performance mods to it but it had ac delco 12 spark plugs that i just got around to replacing not only were they defiantly needing replaced but the car idles so much better and seems to have allot more git-up and go with the NGK TR55s
