Commented on this a few days ago. Mine came in today, the bundle from usp motorsports, and they're the "M"! Will install tomorrow and update with how car is running. I know this may be a stupid question, but the washers that came on each plug stay on there, correct? There are two of them on each plug. Also, you didn't gap them, right? You just threw them right in?
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No problem! I'm just why of 30k so it was a good time to get them.I may pick these up for my 15K tune up. Thanks for the info!!
Would I be correct in saying that in any stock application these are likely a waste of money, or, have guys with stock cars run these with a noticeable improvement? Just curious. Thanks.
Are these plugs recommended for JB4 users? I'm logging peak boost at just under 25psi (24.7psi to be exact) and have additive as much 8psi over stock at the top end with relatively clean logs. Would I benefit from these plugs at all?
Yep I'd get them. The rule of thumb is 1 heat range colder for every 75-100 crank HP added
I'm running them with my JB4 (installed same time as JB4) on Map 2. Runs great.
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