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Originally Posted by SapperMac
This question has probably been asked hundreds of times already, but here goes. I have a 2010 2SS 6M. The only mods are bolt ons at this time. I have a Spectre CAI that was on it when I bought it. I added BBK shorty headers and a Flowmaster 3" cat-back exhaust. I still have the stock mid-pipes on there. It sounds nice, but is a little quieter than I would like. I don't want it to be crazy loud, just less tame than it sounds now. How much louder will it get if I install high-flow cats?
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A set of high flow cats will get you the sound you want.
I went from stock exhaust to stock exhaust with high flow cats... it sounded great.
Then the stock mufflers started rattling so I put on a Solo cat back. Louder and, once I got used to it, better.
Then I put on long tubes and, quite frankly, the sound didn't change that much. More power, to be sure, but not a big change in exhaust note.