I've always run ngk plugs in my vehicles and wanted to do so with my jeep. The trouble I'm having is that since I'm having pinging issues due to advanced timing with my superchips programmer, I wanted to try a spark plug that was one heat range colder, but when I change the part # to one that is one heat range colder, they don't show anything under that #, no matter if its their VPower, Platinum, or Iridium plugs. Has anyone here gone a heat range colder with their plugs? if so, what plugs did you go with?
SOLD-08 Unlimited X, "jeep green", auto, limited slip, hushpower muffler, Aerotech Interceptor gauge,Powerstroke tranny cooler, skidrow evap skid, AFE Pro 7 filter, Teraflex leveling kit, EVO control arm skids, 15x8 Black Rock 909's, 33" KM2's