chevy0128

ok i put a set of ngk tr6 in my car a month or two ago because i was plannin on nos. but i decided to just get some headers instead. So i really dont want to change out the tr6 plugs since they are new. does it matter if i run tr6 NA or will tr55 help me oout?

nor-texLS1

ive always heard to use the tr6's if your runing a stroker setup or nitrous...otherwise use the tr55's....im running the tr55's.

chevy0128

yea but will it matter or hurt power

BayAreaSS

iTrader: (10)

It might take away like 2hp. I would just leave them because changing spark plugs is a pain. I haven't sprayed my car in about 4 months and dont plan on spraying it for about another 2 months. I've had the tr6's the whole time. I did not feel a difference when i went from tr55's to the tr6's

orangeapeel

iTrader: (18)

They wont hurt power. They are just a little bit colder plug. If it isn't a nitrous race plug then I would not even bother messing with changing them.

brad8266

iTrader: (23)

TR6's are fine for NA LS1's.

BlackScreaminMachine

iTrader: (17)

On LT1's I ran them after making over 400 flywheel hp.

Z28/2002

iTrader: (27)

Had them in both my LS1 cars