Thread: Edelbrock cyl heads spark plugs
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Old 05-22-2004, 02:36 PM
BB427 BB427 is offline
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Yes, the 3924 is a direct replacement for the RC12YC Champion that Edelbrock suggest. It shows to be the same heat range but the Autolites are a little hotter. I have great luck with them in comparison to the Champions.

Brent
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