07-03-2008
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#4
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Join Date: Aug 2007
Location: Spring TX
Posts: 1,341
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Re: ALL NEW ZR1 HEADERS AND CATBACKS
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Originally Posted by Aurora40
FWIW, I have SW headers to cats to stock pipes with an LT4 resonator and Dynomax Ultraflows mated to stock tips.
On a Superflow dyno it went from 325 to 350whp with the exhaust, then 370 with the headers.
I think it sounds great, and not nearly as loud as many systems. Though it is not quiet and does have more resonance than stock.
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Is your engine stock?
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