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Cat Back or just replace stock muffler?
Looking for a little more performance out of my 2005 stock 6.0. Exhaust system is in good shape, just wondering if a cat back system is the way to go, or just replace the stock muffler with a different one? Not looking for anything loud, just a few more ponies if possible. Any thoughts?
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72 GMC SuperCustom 4x4
1972 Chevrolet Cheyenne Super 4x4
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