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Quick catalytic convertor question

This is a discussion on Quick catalytic convertor question within the External Engine forums, part of the LSx Technical Help Section category; 2001 ws6 m6, my passenger side cat is clogged so I am going to replace both with Carsound high-flow cats, ...

  1. #1

    Quick catalytic convertor question

    2001 ws6 m6, my passenger side cat is clogged so I am going to replace both with Carsound high-flow cats, question----on stock application I just need 2.5" in/out and just cut off old one and clamp new one in?


  2. #2
    Senior Member 02z28ls1's Avatar
    Join Date
    Sep 2005
    near St. Louis

    navy blue
    2002 Z-28 Camaro M6

    I've been working in exhaust shops and what we would do there is weld it in-clamps are not considered strong enough in that application.This would involve removing the Y-pipe and cutting the convertors out -putting it back in place-then tacking things back together ,removing again and finish welding.I know this sounds like a lot of hassle but trying to do it any other way will involve more work or less than satisfactory results.Convertors generate alot of heat and welding is the only thing that will keep it together with the amount of vibration also.I would give it a shot if you have moderately good MIG welding skills.Otherwise I would pay someone to do it right.

  3. #3
    Super Moderator
    mrr23's Avatar
    Join Date
    Jul 2005
    orlando, fl

    2014 camaro 2ss/rs

    here's a free way to do it. the cats are covered for 8y/80k. take it to the dealer.
    Cold Air Intake, Muffler Delete, Vinci High Performance Dual Valve Springs, Hardened Pushrods, Yella Terra 1.85 Rockers, Some Hydropdipped Stuff, Strut Tower Brace, Some SS Badges, boost/vacuum gauge, fuel pressure gauge

  4. #4
    Ok yeah weld in you say, I see your point here, so 2.5 in and out is fine right? I would have dealer do it but no codes thrown


  5. #5
    Join Date
    Nov 2005

    2000 camaro ss

    how do you know its clogged?

  6. #6
    Senior Member SeVeReDiStOrTiOn's Avatar
    Join Date
    Aug 2005
    Roseville, CA

    05 Wrangler
    00 Z28 sold :-(

    How do you weld on the cats with stock manifolds? I just put on some random tech cats and they bolt-on like the factory cats do....welded the y-pipe to the catback though.

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