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360 My pre-cat cataclysm: cut losses or double down?

Discussion in '360/430' started by basscase415, Dec 22, 2019.

  1. ttforcefed

    ttforcefed F1 World Champ
    Rossa Subscribed

    Aug 22, 2002
    15,602
    brian is the man. he was a big help getting my 40 to platinum!
    congrats on getting your car healthy!
     
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  3. Need4Spd

    Need4Spd F1 Veteran
    Silver Subscribed

    Feb 24, 2007
    6,075
    Silicon Valley
    Brian has testified as an expert on the pre-cat issue.
     
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  4. arizonaitalian

    arizonaitalian F1 World Champ
    Silver Subscribed Owner

    Oct 29, 2010
    13,978
    Wyoming
    Sounds like a good-as-could-be-hoped-for outcome. And "yup", Brian is a true expert, glad you were able to get him on the case.

    One thing that sticks out to me (and I did it too) is that it seems like the definition of insanity to replace with OEM headers/manifolds (I too did that when my CS's pre-cat was failing). Both because of the high-cost and because, well, its literally "doing the same thing and expecting a different outcome". I do think these things seem to disintegrate at a too high rate (too high for me anyways) and we all should be switching to replacement after-market headers. I paid iirc $6500 for one side only replacement header for the CS solely because I was selling it soon afterwards and wanted it to be OEM for the next owner. But if I was keeping it, no way would I put the OEM headers back on it (especially if it were a regular 360 and not the bit-more-collectible CS where OEM arguably has a bit more value).
     
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  5. basscase415

    basscase415 Karting

    Jun 10, 2017
    82
    CA
    I'm right there with you. There are no legal alternatives in my state though. I might be insane, but I'm no scofflaw.
     
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  6. one4torque

    one4torque Formula 3

    May 20, 2018
    2,057
    Houston
    Full Name:
    One4torque
    What if you install oem headers w cat material removed. Then just run the oem cat pipes. Should pass visual and obd2.

    You can have cat readiness tuned out.

    I guess in the end you are right... quite a bit of work to do the above.
     
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  8. G. Pepper

    G. Pepper Two Time F1 World Champ
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    Mar 15, 2012
    22,255
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    George Pepper
    That's a shame. I replaced the stock headers with Fabspeed headers and blankets, and in combination with the OEM vlaved Challenge exhaust it wails like a banshee. Best five valve sound I've heard yet, and a huge load off my mind. Plus no CEL!
     
  9. JC Andruet

    JC Andruet Karting

    Jan 16, 2013
    169
  10. RichardCH

    RichardCH F1 Rookie
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    Jan 16, 2005
    4,641
    indeed no precats
     
  11. AndreB

    AndreB Karting

    Jun 8, 2018
    63
    Houston, TX
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    Andrea
    So EURO cars do not have this issue? Sorry I am learning here
     
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  13. kes7u

    kes7u Formula Junior

    Oct 18, 2017
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    Kevin
    Yes. And nor do the US 1999 models.

    Kevin
     
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