Quote:
Originally Posted by gwsut
Wouldn't original or even reproduction factory style exhaust manifolds with the 2 1/2 inch diameter outlet look, fit, flow, as well or better than the Speedway rams horn headers? They were good enough for the hi-performance Corvettes.
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Still allowed and used in Stock drag racing classes, and for most engines with relatively mild cams they flow just about as well at normal operating RPM.