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  1. M

    Cat delete noise increase

    Thanks for the imput. I do have the muffler on the 4" exhaust so maybe it will not be that much louder. I should be able to remove the cat assmbley and install what MBRP calls their "Front Pipe". That way I can reverse it if it is too loud. Thanks Again.
  2. M

    Cat delete noise increase

    I installed a MBRP 4" cat back exhaust and 3" down pipe on my 07 2500 LBZ. I am thinking about deleting the cat. Will this make the truck louder or no noticable change? It sounds good now and I don't want to get any louder. I can still go to the fast food drive thru without shutting the engine...
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