How long should ngk tr7 last in gt500 ??

[RARESNAKE]

I have a 2007 gt500 with pulley and tune and cold air how many miles should i get out of these plugs before i need to replace them?? Ngk tr7

 

[99SSls1]

Iridium?

 

[Blackmax]

I have a 2007 gt500 with pulley and tune and cold air how many miles should i get out of these plugs before i need to replace them?? Ngk tr7

Really depends on how well your car is tuned, with your mods I would just replace once a year. Plugs are cheap and gives you a chance to have a look at the condition, if you are going to the track I would pull them each time and have a look.

 

[me32]

With just a pulley cai an tune why not run tr6. Normally you dont need a colder plug unless your running high boost