catalytic converter

Discussion in 'General Chevy & GM Tech Questions' started by cascott325, Dec 14, 2008.

  1. cascott325

    cascott325 Epic Member 5+ Years 1000 Posts

    my service engine light keeps kicking on saying that my cats are goin bad, or are already there. at first it was one code, but a few weeks after that came a second along with the first. i cant remember the codes, but if i have it scanned again, i will post them. i know i need to replace them, and intend on doing so, but i am not going to cut and weld, i am going to go the direct fit path. what are some suggestions to get the most performance out of this investment. i need to know stories of success, failure, pleased and displeased, expensive vs. not as expensive, brands, product variations, etc.

    thanks for your input
    Last edited: Dec 14, 2008
  2. ct9a

    ct9a Epic Member 5+ Years 1000 Posts

    Thermal (something, memory fails me now) is what I have on mine and I love it. I've also used their products in the past on my other cars.
  3. _BT_

    _BT_ Member

  4. unplugged

    unplugged Epic Member 5+ Years 1000 Posts

    It really depends on what your goals are. You didn't post what kind of vehicle you have. You might want to update your signature so others can provide accurate responses.

    I made the mistake once of assuming that everyone likes what I like so when a friend asked me to get a new muffler system installed on his ride I took it to my favorite muffler shop and had them install a dual exhaust with turbo mufflers. It sounded so sweet (to me). Unfortunate for me, my friend is a classical music buff and he hated it. I felt obliged to spend the money out of pocket to have the performance exhaust removed in favor of the more quiet factory system.

    For my 93 burb I went with a 3" catback system using a Magnaflow and a stock cat. Sounds good to me and the top end performance feels better.

    So for performance go with the high flow cats and dual exhaust.
    For compromise, try a cat back system.
    For a more tame sound stick with the factory specs.

    As always check your local emissions regs if you want to maintain the resale value.
  5. cascott325

    cascott325 Epic Member 5+ Years 1000 Posts

    i have a 2000 silverado with a 5.3l v8, shorty headers, upgraded plugs, 8.5 mil wires, factory cats, flowmaster 40 series muffler(1 in 2 out) w/ 16 inch stainless silverline tips. i think my tubing is 2.5" but i havent measured, so im not sure. i have a k&n air CIA. its a 4x4 z71 offroad package. Ls model.
    extended cab 117k miles
    Last edited: Dec 15, 2008
  6. cascott325

    cascott325 Epic Member 5+ Years 1000 Posts

    just bringin it back to the top.
  7. cascott325

    cascott325 Epic Member 5+ Years 1000 Posts

    anyone have any ideas for me? i could really use the help.
  8. _BT_

    _BT_ Member

    uhhhhhhhhhhhhhhh did you not see post #3?
  9. cascott325

    cascott325 Epic Member 5+ Years 1000 Posts

    lol. yes i did, but i like to hear alot of opinions. i did check out the page, and im liking whit i see. thanks
  10. _BT_

    _BT_ Member

    Here's my opinion: stay away from Random Technology cats. Their ceramic cores tend to come apart and rattle like crazy. It happened to me. I'm running Pacesetter cats in my GTO now and havent had any problems.

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