04-11-2009, 09:15 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Dave, with your upgraded exhaust, I'd venture to say that the horsepower loss isn't that much.
I would say for the guys running the normal restrictive glass pack mufflers, that 22% is a good estimate.
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