well i went to automotive engineering today and bought some ngk's that are 3 heat ranges colder. they are R56721-8 or part number 7173 (NGK 8's). tell me if these are ok for anywhere between 25 and 50 shot
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1992 Honda Civic Si: SOLD
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Last edited by civicSi07; Sep 1, 2006 at 07:03 PM.