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    GM Performance Exhaust

    My Borla Atak muffler has Borla Atak stamped in 4” letters on the outside of the muffler.
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    Muffler change only.

    My 2020 w/6.2L had flapper valves immediately before and after the muffler. I kept the muffler in case anyone ever wants to put it back on. It’s currently up in the garage loft. I’ll try to find a pic.
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    Muffler change only.

    Borla 400844 Sbc Hot 350 383 https://a.co/d/aOyfa0H
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    Muffler change only.

    I swapped in a Borla Atak muffler and deleted both flapper valves. Left the resonators and stock tips on. It’s a loud cold start but the sounds mellows right out.
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    How do you prevent cargo from sliding around in the bed of your AT4?

    I have a 2020 AT4 with the short bed. It has a Retrax Pro retractable cover and I just installed an undercover swing out tool box on the passenger side. The swing out box is convenient but smaller than I thought it was going to be. I use some shorter rubbermaid containers to store some tools and...
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    Swing out toolbox?

    The manufacturer states that it only works without MultiPro tailgate? I assume that means that the drivers side won’t work because of the grab handle?
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    Swing out toolbox?

    Which toolbox did you have? Where did you get it?
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    Swing out toolbox?

    Does anyone have the swing out toolbox? If so, how do you like it? I have a Retrax Pro cover but I was looking for somewhere that I can keep a small tool bag for some grab and go tools for work. I also need it to work with the cover.
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    What did you do to your AT4 today?

    Borla Atak muffler installed today. Sounds good.
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    Bed Cover Suggestions

    Retrax Pro for sure. Great cover with flexibility to add ladder racks, cross bars, bike carriers, etc.
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