leading spark plugs

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Oct 24, 2008 | 10:00 AM

nho?

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Joined: Oct 2008

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From: Kansas City

leading spark plugs

my friend from japan just started putting leading spark plugs in the trailing spots so he has 4 leading spark plugs. he claims it works better for higher rpm's. what is your guys's imput on that?

Last edited by mar3; Oct 24, 2008 at 11:33 PM. Reason: rlsd

Oct 25, 2008 | 06:42 AM

dgeesaman

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From: Hershey PA

It can work. There are more than just the stock heat ranges and if you search the site you'll find what people are using and the tradeoffs they're making for it.

Oct 27, 2008 | 07:26 AM

zinx

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From: Indianapolis

It should be the other way around, trailing in leading, but if you aren't making more than stock HP, its not going to help you. Just use the factory suggested plugs if you are stock or close to stock.