Originally Posted By D-50
Originally Posted By MR_P_BODY
I'm using the 3924 in my 416 injected engine
wave


I have been running a AR3933 plug and was thinking about running one a step hotter. Which one would that be a AR3932 or AR3934.
On Autolite plugs the smaller the number the colder the plug, 3934 are the next hotter from the 3933 thumbs

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)