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  • Aftermarket cat dying?

    It started rattling recently and i dunno if a bad cat would make your exhaust sound like its leaking but when im next to a building or curb and accelerating a lil bit it sounds like theres air coming out from under the car.

    Also i have no idea what kind of cat this is anyways, its 3" in/out aftermarket but never had a brand name on it. But here is a pic of it if anyone can help identify it. I think it looked like the magnaflow one, but doubt its magnaflow, for all i know it could be Murrays auto store special lol

    Pic of the Cat

    Also if this thing is shot should i buy another cat? What brand? or since i have o2 sim in there now jus put in a straight pipe cuz theres no emission tests in michigan, but im wondering how that would sound and if would hurt the back pressure.
    99\' W68 Firebird<br />SLP Ram air kit,Whisper Air Lid, k&n, 8mm Taylor Wires, Bridgestone Potenzas RE950, BMR Red LCAs, Pacesetter Headers and 3\"in catalytic converter with 2.75\" Flowmaster Cat-back<br /><br /> <a href=\"http://www.cardomain.com/memberpage/501008\" target=\"_blank\">http://www.cardomain.com/memberpage/501008</a>

  • #2
    First thought would be a heat shield coming loose. Tap on it with a hammer or something and see if it rattles. If it does, try just removing the heat shield around the cat.
    Matt
    1998 Mystic Teal Camaro M5
    Whisper Lid, Pacesetter Headers, Catco Cat, Dynomax Super Turbo, B&M Shifter, BMR STB, LSD, P&P Intakes, GT2 Cam, Comp OE Lifters, 1.7 Roller Rockers, Pushrods, SSM Heads, DHP PowrTuner.

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    • #3
      heat shield around the cat was removed 2 months after i got it LOL so already been thru that
      99\' W68 Firebird<br />SLP Ram air kit,Whisper Air Lid, k&n, 8mm Taylor Wires, Bridgestone Potenzas RE950, BMR Red LCAs, Pacesetter Headers and 3\"in catalytic converter with 2.75\" Flowmaster Cat-back<br /><br /> <a href=\"http://www.cardomain.com/memberpage/501008\" target=\"_blank\">http://www.cardomain.com/memberpage/501008</a>

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      • #4
        I would just put a straight pipe in there ;)

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