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Thread: Gutting Cats?

  1. #1

    Default Gutting Cats?

    Has anyone gutted their cats on the NBS silverados? Im looking to do this with my truck and was wondering if anyone has done it already and could let me know what they did.

  2. #2
    Master Mechanic Silverado Junkie's Avatar
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    Never done it on a NBS Silverado, but the way I always did it was to remove the screens on each end of the cat, then bang the ends until all the guts fall out. Sometimes you might have to use a screwdriver or something similar to help pry the guts outs. Then when your done, just weld them back in place.
    1995 Silverado,Z71, 3-inch lift,2-inch leveling kit, SkyJacker Suspension, short ram-air intake, throttle body spacer, MSD ignition coil, straight pipes

  3. #3

    Cool gutting cats

    Your truck has O2 sensors before and after the cats. If you gutt the cats you will get a engine code. The newer factory GM cats flow very well. I would just install a cat-back system.

  4. #4
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    Quote Originally Posted by silveradotrailblazer View Post
    Your truck has O2 sensors before and after the cats. If you gutt the cats you will get a engine code. The newer factory GM cats flow very well. I would just install a cat-back system.
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  5. #5
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    Cats on the newer trucks are already a high flow. Leave them alone IMO.
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  6. #6
    Master Mechanic Silverado Junkie's Avatar
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    They do have a point I didnt think of for your truck. But if you still wana remove your cats, then get a tuner that will allow you to remove your cats without any codes. Because horsepower is a terrible thing to waste and no cats is still better than any high-flow cats.

  7. #7
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    Unless your cats are shot, there is no reason to gut them or delete them.
    Black Bear Performance- Custom Tuning Solutions

    Authorized EFILive and MAGNACHARGER seller

  8. #8

    Default

    I have a cat code on my 96 Tahoe with Vortec 350. Apparently from running too long with a leaking FPR. The FPR is fixed, along with the leaking intake manifold.

    Are the replacement Y-pipe/cats for these any good? I know my head pipes are quite small compared to my 97K200 w/350. Should I put the bigger pipes on if I do replace the Y-pipe?

    Replacement head pipe is over three hundred, that's a $400 job by the time I get it done, if everything goes well. I'm considering gutting the cats.

    Jenna - can you do a tune for my truck with a Cat delete? What about EGR delete?
    When you hear hoofbeats, look for horses not zebras.

  9. #9
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    Yes we can do an offroad tune for your cats and EGR.

  10. #10

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    Quote Originally Posted by JennaBear View Post
    Yes we can do an offroad tune for your cats and EGR.
    What's a ballpark price, exchanging PCMs?

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