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11-24-2012, 10:27 AM
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Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: Correct 454 Exhaust Pipe Diameter?
If you are really bent (or rule restricted) to keep the stock manifolds, after initially porting on them like Motornut mentioned above, I send them out to be extrude honed. Keeps that stock appearance and picks up several HP
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