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  1. #1
    Sr. Apprentice
    Join Date
    Sep 2008
    Lexington, KY

    Default aftermarket converter opinions

    Polling opinions for everyday use aftermarket catalytic converters....

    I've only used Magnaflow in past vehicles....seeing what everyone has to say. Application is a very mild 350 TBI, headers, 3" tubing, Flowmaster 40 case.
    that rug really tied the room together, man.

    i am the walrus. shut up donny.

  2. #2
    Sr. Apprentice
    Join Date
    Feb 2010
    Avondale, AZ


    Magnaflow has been the only one for me as well... interested to see the opinions...

  3. #3
    Master Mechanic Silverado Junkie's Avatar
    Join Date
    Feb 2010
    Lead Hill, Arkansas


    I wouldnt spend my money on aftermarket cats. Even the best high-flow cat on the market still cant touch the power potebtial of no cats. And cutn them off wont make your truck louder, its your muffler choice, exhaust length, and diameter. So if u want great power and managable sound, use no cats and a good flowmaster, if u want your truck to sound great and have great power, go the straight pipe way like me. Either way is a great choice.
    1995 Silverado,Z71, 3-inch lift,2-inch leveling kit, SkyJacker Suspension, short ram-air intake, throttle body spacer, MSD ignition coil, straight pipes

  4. #4


    I got excited and thought your thread was about torque convertors. But no. Yeah man, ditch you cats.

  5. #5
    Sr. Engineer
    Join Date
    Jun 2009
    San Diego, CA


    Your stock cats are already high flow cats. If your stockers are going bad, then yes I would replace them. I am running Magnaflow cats on the Tahoe and SSS.
    Black Bear Performance- Custom Tuning Solutions

    Authorized EFILive and MAGNACHARGER seller

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