NW-99SS

iTrader: (6)

Car is 1999 M6 SS with Patriot Stage II heads/Lunati Cam and full bolt ons.

Which plugs should I be using? Thanks!

95ztrey

TR55 for sure , TR6 is a colder plug , Are you spraying ??

JonCR96Z

iTrader: (33)

You're gonna get a lot of responses for both. Truth is there are too many variables with your combo (compression, cam size,etc,..) and little difference between the plugs.

Run which ever you want and get a good tune. You'll likely never know the difference.

Bad Blue WS6

iTrader: (41)

^ true

i have always looked at it like this

TR6 = Nitrous motor
TR55 = NA motor

bigti99a

iTrader: (16)

most here will preach like the posters. 55 for NA. and 6 for spray.

NW-99SS

iTrader: (6)

Alright, sounds good! Probably just go with TR6s as I plan to spray it next year.

Thanks guys!

JonCR96Z

iTrader: (33)

TR6s aren't nitrous plugs. Most just use them with smaller shots because they are somewhat colder than a TR55. In most cases better tuning would make more difference for safety and power.

When you get ready to add nitrous I would suggest reading up a little in the nitrous section and plan on changing plugs again.

c0ncEpT

iTrader: (4)

For every 100-125hp you add you should go 1 step colder on the plug IMO. TR6 is what you should be using.

killaxtranz

iTrader: (3)

i run tr7's with nitrous but a couple of my buddys run tr6's they run just as good with em never any problems with either