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Thread: aftermarket catalytic converter

  1. #1
    STStyle is offline Cadillac Owners Member
    Automobile(s): 98 STS
    Join Date
    Dec 2004
    Location
    New Jersey
    Posts
    17

    aftermarket catalytic converter

    I need to replace the catalytic converter on a 98 STS. Does anyone
    know what brand, size, or part # is needed to replace this cat. I want
    an aftermarket cat so I can have a custom exhaust set up. I'm thinking,
    new cat, remove resonator, and dynamax mufflers. All thoughts greatly
    appreciated.


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  3. #2
    brougham is offline Cadillac Owners Master
    Automobile(s): 1991 Cadillac Brougham D'Elegance 5.7 Litre, 1994 DeVille
    Join Date
    Jun 2003
    Location
    Canada
    Posts
    6,476

    Re: aftermarket catalytic converter

    Call a parts store. They can tell you all that stuff and they can also tell you how much it is.

  4. #3
    davesdeville's Avatar
    davesdeville is offline Banned
    Automobile(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
    Join Date
    Aug 2003
    Location
    Albuquerque, NM
    Age
    29
    Posts
    7,971

    Re: aftermarket catalytic converter

    I'd leave the resonator in if I were you otherwise it will sound like your car is powered by thousands of bees with all the drone you'll be hearing.

  5. #4
    Join Date
    Mar 2005
    Location
    NY
    Posts
    125

    Re: aftermarket catalytic converter

    i went with a 2.5Inch magnaflow hi-flow cat converter, it completely enhanced my corsa exhaust tone. I love it, deeper tone, a little more torque . Its a universal for a 99 STS,. and this is what they gave me. I suggest this one.
    i also went 2.5 so it matches the 2.5inch corsa...i dont want the car too loud. right now its perfect.


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