I have a supercharged LT1, and stock plugs. other mods are hooker LT's, magna flow muffler, 58mm tb, pcm4less tune, th350, 4.10, M/T drag radials, 160* thermostat, MSD BTM, MSD coil, 1.6 RR's.

my question is what would be a colder plug#
brand doesnt matter. thanks Brian

 

Go with a nitrous plug tr6s or you can just gap them at around 38 instead of 45 50 stock