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  1. #1

    Default exhaust cut outs after cats

    those of you considering cut outs on our 3.7s,do yourself a favor get a good muffler instead. unless your going to eliminate your cats. I decided to get the cut out and what a mistake it sounds nice at idle, but other then that it sucks. you lose a lot of bottom end grunt. and the sound in the cabin is terrible. i now keep it closed. with what i spent on the cut out and install ,about a hundred dollars. i could have put a little more in and gotten a good flowmaster, dynomax, or whatever. i think it would have sounded better, and the performance would still be there. anyone who is considering this move would probably be better off going staight pipe. hope i have helped someone.
    Last edited by 09colo; 02-26-2012 at 10:58 AM. Reason: spelling

  2. #2


    Sorry to hear this mod didnt work out for you, but if its any consolation you may be helping other not to make the same mistake.

  3. #3


    Welcome to the GM T C! Thanks for sharing!
    Last edited by retired2001; 02-27-2012 at 09:55 PM.

    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

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