What to Gap NGK TR6's
#4
My opininon only now, but TR6's are way to cold for a 2# pulley unless your just going to be racing. Just everyday driving and idling they will foul, the truck wants to hesitate when you get on it until they clean up. Go with the TR5's and gap them @ .044 or .042. I run a 6# and I use the TR5's because I fouled the TR6's with daily driving.