A friend suggested I replace my plugs w/ autolite double platinum plugs. The guy at the parts place where I bought them told me not to mess w/ the gap on these plugs. Does anyone else use these and do you change the gap on yours?

A lot of the guys on here run the Autolite 3923 plugs and have good results. Mud Buddy recommends them on their performance motors so I'm sure they're fine. As far as gap, I always just make sure they're at .035 and if the guy told you not to check your gap before putting them in, he's an idiot.

I recently replaced my plugs with NGK 3696 plugs and maybe it's mental but I notices the engine ran smoother.