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  1. 21 Air Rebel

    2021 5.7L Muffler question re. size/configuration

    It’s been over a year now and no change that I Can tell. No drone while driving it’s quiet. A little louder at idle. Good tone for me was not looking for loud or any noise in the cab.
  2. 21 Air Rebel

    2021 5.7L Muffler question re. size/configuration

    Just installed the B2 Fab resonator delete kit with the 5 inch tips running the stock muffler. If your looking for just a good tune so your truck sounds like a truck its perfect. Pretty much sounds like the clips of the B2 moderate muffler with resonator delete.
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