Results 1 to 10 of 10

Catalytic converter help

This is a discussion on Catalytic converter help within the General Help forums, part of the LSx Technical Help Section category; i recently bought a 98 ws6 and it has headers with a 3in y-pipe and no cats. well, of course, ...

  1. #1
    Junior Member
    Join Date
    Jun 2011
    Location
    Springfield, MO
    Posts
    3

    White
    1998 Trans Am

    Catalytic converter help

    i recently bought a 98 ws6 and it has headers with a 3in y-pipe and no cats. well, of course, it didn't pass inspection. My question, can i just buy one cat and put it where the two pipes join to one and just have one cat or does it have to go directly behind the headers? Because theres no much piping behind the headers. thanks

  2. #2
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    Quote Originally Posted by checkmate151 View Post
    i recently bought a 98 ws6 and it has headers with a 3in y-pipe and no cats. well, of course, it didn't pass inspection. My question, can i just buy one cat and put it where the two pipes join to one and just have one cat or does it have to go directly behind the headers? Because theres no much piping behind the headers. thanks
    well it depends. Did you fail a visual inspection or did you had a check engine light on? If it was visual inspection you will need to have 2 cats. I believe you have to have a cat per manifold or header. Some places won't even pass the visual if you have headers. They were specific about just cats?

  3. #3
    Waiting on the Tree transamtom's Avatar
    Join Date
    Jul 2005
    Location
    Niagara Falls Ont.Canada
    Posts
    927

    NBM
    1999 TA A4

    Like Jay said was it visual that you failed? or the tailpipe test?

    I think the cat would be too far downstream to "light off".

    Thats why the OEM's put them so close to the manifolds now.

    You could try it,what have you got to lose?

    Just make sure you drive your car for a bunch of miles before you go for the test.

  4. #4
    Member Blue28's Avatar
    Join Date
    Nov 2007
    Location
    Ca.
    Posts
    769

    Navy Blue
    1999 Camaro Z28

    Yeah, we'll need more details about exactly what you failed.

  5. #5
    expensive tires az gt eater's Avatar
    Join Date
    Mar 2006
    Location
    phoenix
    Posts
    1,951

    white
    04 2500 4x4 crew cab

    If you have a check engine light on, you fail, period. Having your computer retuned will fix that.

  6. #6
    Member bostonbruins34's Avatar
    Join Date
    Jun 2006
    Location
    Newnan, Ga
    Age
    50
    Posts
    102

    GM LeMans/Luxo Blue
    2001 Firebird Formula

    I went with 2 small magnaflow Hi-Flow cats just before the t-pipe. Passed the visual and got the rear o2's deleted with a Frost Tune so no concerns of o2 placements. The mini-cats had no clearance problems and cost about $65 each.

  7. #7
    Member bostonbruins34's Avatar
    Join Date
    Jun 2006
    Location
    Newnan, Ga
    Age
    50
    Posts
    102

    GM LeMans/Luxo Blue
    2001 Firebird Formula

    CORRECTION! Just pefore the y-pipe that is...

  8. #8
    Junior Member
    Join Date
    Aug 2011
    Location
    az
    Posts
    1

    blue
    2002 camaro z28

    How or who could retune the computer?

  9. #9
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    Frost and TampaTuning are members on the site that can do mail order tunes.

    I have a Frost tune. TampaTuning became a sponsor after I got mine. Both have good reps.

    Check in the sponsor tab to get there web sites.

  10. #10
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Get the cats and the tune. Win-win I say.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Question: Catalytic converter question.
    By 5150 in forum Western Members
    Replies: 11
    Last Post: 07-22-2011, 06:19 AM
  2. Help: bad catalytic converter
    By KJax2010 in forum GTO
    Replies: 4
    Last Post: 06-23-2009, 10:43 AM
  3. Catalytic converter!!
    By caveblazin in forum Parts Wanted / Trade
    Replies: 0
    Last Post: 09-24-2007, 11:44 PM
  4. Catalytic Converter
    By BWS6 in forum External Engine
    Replies: 3
    Last Post: 07-30-2006, 02:42 PM
  5. catalytic converter
    By beerslob in forum Parts Wanted / Trade
    Replies: 3
    Last Post: 03-16-2006, 09:07 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •