Thread: Resonator delete on stock mufflers WITH catless DP
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      11-03-2019, 05:36 PM   #13
speedracerlo
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Drives: 2015 M6 Gran Coupe
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Anyone have some video clips of the setup? Catless DP + stock mufflers. I have been Catless DP + Muffler bypass for years, but I am trying to go back to stock.
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