Quote:
Originally Posted by huffandpuff00
Dont waist your money on Iridium plugs. The shop I have my car tuned at runs NGK copper plugs on their 1000hp supras just fine. I think they are 4464(bkr7), like a dollar and some change and gap .28
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Depends how you view it. Copper tends foul much early than Iridium IMO. Iridium will be best if you want to just put the set and not worry about it for awhile. High HP cars you kinda need to check and replace those things more often so cheaper plugs wil be better. Daily setup go with Iridium last longer and not risk stripping thread on the head.