what spark plugs
NGK-TR6 plugs are good...if you need a colder plug, like if you run nitrous(which I do).
NGK-TR55 is the plug you should use with simple bolton cars. Generally, for every 50 hp that you add you need to decrease the gap by .004. If you add 150 hp over stock you should decrease the gap .012. So .060 is the stock gapping...and you decrease the gap from there depending on how much hp you have added.
NGK-TR55 is the plug you should use with simple bolton cars. Generally, for every 50 hp that you add you need to decrease the gap by .004. If you add 150 hp over stock you should decrease the gap .012. So .060 is the stock gapping...and you decrease the gap from there depending on how much hp you have added.
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