[El Diablo]

What spark plugs should you use on a 04 cobra with 100 shot and over nitrous system. My friend just installed his and needs to know.

[Julian Moore]

A usual guid is 1 degree cooler per 50 shot. So I run a 2 degree cooler plug on my 125 shot. Hope this helps.

[ro51468]

Look at the NGK. I tried a lot of plugs before settling on the NGK's.

Ron

[hotwheels]

i would probably get ngk too, just be sure you get a plug that is one heat range colder then stock........hotwheels of turborides

[Mana4Real]

You should just need an NGK TR6 (one step colder)... If you want to, you could go two steps colder to a BR7EF, but the car runs a little bit different. It's hard starting. I have that problem right now. I'm considering getting it re tuned with less timing so I can run the TR6.