Because...thats whats it designed to run on...sometimes putting a higher performance plug in place of an OEM plug and can cause engine problems...
I have never used them but I've learned in the pass that spark plugs really don't help that much over OEMs. But if you buy crappy ones, you would notice it lolhas any body heard of pulstar spark plugs
I have...but I for sure has heck don't think they are worth no $25 a plug...it would cost $400 to have the HEMI's plugs changed to those....NO thanks....lol..
Dude, there's 16 plugs in a HEMI and the later 4.7Why?
I could just do it myself lol
Dude, there's 16 plugs in a HEMI and the later 4.7![]()