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Exhaust - cat not flowing

Discussion in 'Technical Q&A' started by seschroeder, Apr 18, 2006.

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  1. seschroeder

    seschroeder Formula Junior

    Apr 25, 2002
    251
    Alexandria, VA
    Full Name:
    Steve Schroeder
    #1 seschroeder, Apr 18, 2006
    My 1982 GTSi is flowing much more exhaust from the left two pipes as from the right two. I suspect the left cat is not right. That in mind, I would like to fabricate a test pipe before spending fairly large dollars on a new cat. At one time, a while back, there was a post giving the NAPA part numbers for the exhaust donuts and exhaust flanges. Anyone have information??

    As always , thanks in advance.

    Steve Schroeder
     
  2. Dr Tommy Cosgrove

    Dr Tommy Cosgrove Three Time F1 World Champ
    Owner Rossa Subscribed

    May 4, 2001
    36,426
    Birmingham, AL
    Full Name:
    Tommy
    #2 Dr Tommy Cosgrove, Apr 18, 2006
    I think they all do that anyway because of the muffler. Mine seems to favor the left side too and it's an 84 with one cat.
     
  3. MufflerMan

    MufflerMan Formula 3

    Jun 12, 2005
    1,564
    Sacramento Ca
    Full Name:
    Colby Sandman
    #3 MufflerMan, Apr 18, 2006
    I don't know of any napa part numbers, but a good muffler shop should stock those. If I remember we had what was needed to do the last 308 we worked on. Unfortunately, I don't have a part # for you because we found what fit as we worked on the car. I would suggest taking it apart and having someone match the parts you need. Good luck.
     
  4. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,090
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    #4 Rifledriver, Apr 18, 2006


    Normal
     
  5. Meister

    Meister F1 Veteran
    Silver Subscribed

    Apr 27, 2001
    5,516
    Duluth, MN
    Full Name:
    The Meister
    #5 Meister, Apr 18, 2006
    I just did a custom exhaust set-up and a standard 350 GM SBC flange and donuts worked. Sorry I don't have a part # but they should be 2"
     
  6. ferrarioldman

    ferrarioldman Formula 3
    Professional Ferrari Technician Silver Subscribed

    Jun 19, 2002
    1,033
    Summerfield, NC
    Full Name:
    Tom Jones
    #6 ferrarioldman, Apr 18, 2006
    No need to go to all that trouble. It's normal. A search in the archives would have turned up many threads about this.
     

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