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Re: “Quiet” performance mufflers
I've been running the same exhaust setup and muffler with my TPi 305 and now a stock 5.3L LS. Basically 2.5 inch pipes off the headers, to a 18" body magnaflow muffler, 3" single out that exits behind the rear tire past the body. It's got great sound on the outside but zero resonance in the cab. Very nice to drive.
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