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Ceramic coated headers do help quite a bit. So does 11:1 compression, 9:1 motors run too hot and are too weak for my tastes. Also make sure your timing isn't too retarded. A good fan that moves at least 1000cfm of air helps keeps everything from cooking. It's also a good idea to glue heat reflective blanket on the underside of the fenders just over where the headers exit to meet the sidepipes to prevent the fiberglass from getting "wavy"
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