Thread: Spf Exhaust
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Old 11-17-2008, 04:21 PM
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Cobra Make, Engine: #1459 w/460(sold)New(used),spf w/427s.o.(sold)
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Default Spf Exhaust
Is it the headers or mufflers that are the H.P. killer? If one could only replace one of the two, which would be more worth while?
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