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Originally Posted by USAFPILOT
I would like an increase in sound and HP while retaining the stock appearance from the street.
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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.