whats the best spark plugs??? and whats the best performance mods for $900???

[Beatdown Z]

i thought it was the other way around. tr6 being 1 heat range colder

You're right. The higher the number, the colder the plug. Most N/A guys run TR55's. Most FI and N2O guys run TR6 or colder.

[02gmcbandit]

you well regapped em to .060 and theyre ok. not AMAZING or anything like some people say, but better than the acdelco's i had in ...but truck is down now thanks to a broken extention housing