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Old 10-01-2012, 07:05 PM   #15
Drives: 2018 2SS
Join Date: Jun 2012
Location: Ohio
Posts: 291
Originally Posted by Dtrimpi87 View Post
Yes after market catback systems offer 0 gains. Purely enhanced sound.
Then how does the NPP add 6 hp on the Corvette? Are you saying that the regular exhaust on the Camaro is more efficient than the regular exhaust on the Corvette?
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