AC Delco Spark Plug - The Supercar Registry

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AC Delco Spark Plug

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06-10-2009, 12:29 AM

Salvatore Salvatore is offline

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Re: AC Delco Spark Plug

I am running the NGK's in the Z/28. Seems to be doing fine. Don't seem to have anymore power/RPM range than the R44S's that I took out. May be faster on the track because you can't always feel a couple tenths but I don't seem to get more out of the NGK's (longevity) than I do the AC's.

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