08-25-2012, 06:41 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
I don't think I agree with an undercar exhaust making less horsepower. It just depends on what size mufflers you go with.
However, most sidepipes are extremely restrictive and the collectors on sidepipe headers are sometimes at extreme 90° angles. There have been members here that dyno'd with and without sidepipes and there has been 100hp difference.
The horsepower difference is one of the reasons why I would go with undercar exhaust...
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