Best Spark plugs?
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Best Spark plugs?
In your experiance, what is the best spark plug for LS1. I am running a NGK TR6 resister. Is this one O.K.? Also Horse Power on a stock 98 LS1 out of an iroc. Yes I know "total newbie".
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Everyone says NGK and I am running the TR55's no problems, thinking of swithcing to the TR6, but the machine shop that my buddy works at swears by good old Delco's so its really a personal choice.