spark plugs for a full top end ported engine

[flyin ryan]

Originally Posted by Jeffvette

John, anything that comes into me gets the NGK iridium plugs. I've been extremely happy with them on my 368 and other cars I've used them in.

I use them on my cars as well as on some of the better engines I build. They are spendy but worth it, I feel. Sounds like your creeping up on it Johnny .