Chevrolet Corvette Maintenance E3 Spark Plug Next To Stock Plugs
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The heavy black carbon deposits on this midyear plug indicates the big-block bad boy is running very rich. In addition to adjusting the carburetor to lean it out a bit, we also replaced the plugs with a new set of E3 high-energy plugs (www.e3sparkplugs.com) that don't require any gapping. View Related Article
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