i have ran bosch plautnum 3s in my 2001 dodge 2500 4x4 5.9, 1986 chevy short bed 4x4 with a 454 and my 1958 amc rambler wagon with a 350 chevy and i love them. now i don't think they make it run better or etc but they seem to last a bit longer they aren't to highly priced and my POV is why change somehting that works?

 

You bring up a good point cause I've heard from a handful of guys that they're good plugs. I never could figure out why I got three cylinder misfires after installing my E3's...

 

i think i will hold out on the e3 plugs for now, sounds like a good old champion plug for me right now. i will just get what came in it from the factory.

 

You can always pull the old plugs, regap and sharpen the edges, and I'd be willing to wager the response would improve as well.