Thread: Muffler replacement huge horsepower gains!
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Old 04-14-2009, 05:21 PM
madd matty madd matty is offline
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Cobra Make, Engine: superformance 418win.
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and we have a winner . i think dean nailed it at least in my case. at 9000miles my left pipe started to buzzzzz . baffle broke weld. It only made noise when hot.
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