Gutting Cats?

Discussion in 'Performance & Fuel' started by kwalls22, Jun 6, 2010.

  1. kwalls22

    kwalls22 Rockstar

    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. Silverado Junkie

    Silverado Junkie Rockstar 4 Years 500 Posts

    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.
  3. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    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. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    X2 .................... :great:
  5. vncj96

    vncj96 Epic Member 5+ Years 1000 Posts

    Cats on the newer trucks are already a high flow. Leave them alone IMO.
  6. Silverado Junkie

    Silverado Junkie Rockstar 4 Years 500 Posts

    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. JennaBear

    JennaBear Rockstar 100 Posts

    Unless your cats are shot, there is no reason to gut them or delete them. :neutral:
  8. 2COR517

    2COR517 Epic Member 5+ Years 1000 Posts

    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?
  9. JennaBear

    JennaBear Rockstar 100 Posts

    Yes we can do an offroad tune for your cats and EGR.
  10. 2COR517

    2COR517 Epic Member 5+ Years 1000 Posts

    What's a ballpark price, exchanging PCMs?

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