Thread: Side pipes and headers SPF 351
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Old 06-01-2013, 04:39 AM
vatdevil vatdevil is offline
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Join Date: Jul 2010
Location: McMurray, PA
Cobra Make, Engine: Superformance #522
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Installed larger mufflers into existing side pipes then recoated. You will pick up some HP with that size motor, 10-20?, and will really sound much better. If you go 3 inch muffler you will need earplugs all the time.
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