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Gutted cats

This is a discussion on Gutted cats within the External Engine forums, part of the LSx Technical Help Section category; I'm thinking about gutting my cats and adding some o2 sims. Has anyone done this? I'm wanting to add a ...

  1. #1
    Member jimmy77611's Avatar
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    2000 Z28

    Gutted cats

    I'm thinking about gutting my cats and adding some o2 sims. Has anyone done this? I'm wanting to add a little power but retain a stock look.

  2. #2
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    did it when mine went bad a second time. gained virtually nothing, but louder exhaust.

  3. #3
    Senior Member 35thAnniZ28's Avatar
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    eating bulldog
    son of biscuit

    do it...sims work

  4. #4
    Slow'er'Ass Mr. Luos's Avatar
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    2008 Trailblazer SS

    Quote Originally Posted by 35thAnniZ28 View Post
    do it...sims work
    For a month or two.


    Is there is a local shop that can just tune out the rear O2's for you?
    It was cheaper for me to do that than it was to get sims.

  5. #5
    Member Z28LS1's Avatar
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    black
    1999 Camaro Z28 M6

    i've got sims too.. but i regret not going to a shop and getting them tuned out. I heard you could get it done for $50.. but even if its 100 i would have done it cause you'll need extentions too.. together its almost $100

  6. #6
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    I paid $45 for code removal for EGR and AIR.
    About a year later...$50 for the rear O2 codes.

  7. #7
    Member jag42420's Avatar
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    Sims suck, and are expensive if you can find them. Get tuned out or trick them like this http://www.srtforums.com/forums/showthread.php?t=93604 if you eliminate the cats.

  8. #8
    Senior Member 35thAnniZ28's Avatar
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    eating bulldog
    son of biscuit

    i ttly regret what i said..they suck!

  9. #9
    Member jag42420's Avatar
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    Have one fail?

  10. #10
    Senior Member 35thAnniZ28's Avatar
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    eating bulldog
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    2!...

  11. #11
    down in it 310stanger's Avatar
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    dont gut working cats. cats are expensive if you ever decide you want them back. plus i've read in detailed exhaust articles that gutted cats actually flow worse and dont compare to an offroad pipe. do it right and get an offroad pipe, otherwise keep the cats. its not worth the aggravation.

  12. #12
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    pie
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    I wish I had just gone with the offroad pipe. Had a high flow cat blow out on me after a month. Gutted it and the other one but noticed the air was definitely not flowing quite right, removed the cats altogether and the problem went away.

  13. #13
    ...going to the darkside gspfunk's Avatar
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    I've read that there isn't much difference in power between Hi Flo cats and no cats, and you can get Magnaflow cats on ebay for $55 each. Unless you can weld, though, you'll have to pay to get them installed. ...may be a cheaper option than an O/R pipe though.

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