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
    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
    Silicon Valley
    Brian has testified as an expert on the pre-cat issue.
    basscase415 likes this.
  4. arizonaitalian

    arizonaitalian F1 World Champ
    Silver Subscribed Owner

    Oct 29, 2010
    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).
    basscase415 likes this.
  5. basscase415

    basscase415 Karting

    Jun 10, 2017
    I'm right there with you. There are no legal alternatives in my state though. I might be insane, but I'm no scofflaw.
    Need4Spd and arizonaitalian like this.
  6. one4torque

    one4torque Formula 3

    May 20, 2018
    Full Name:
    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
    Rossa Subscribed

    Mar 15, 2012
    Full Name:
    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
  10. RichardCH

    RichardCH F1 Rookie
    Silver Subscribed

    Jan 16, 2005
    indeed no precats
  11. AndreB

    AndreB Karting

    Jun 8, 2018
    Houston, TX
    Full Name:
    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
    Shorewood, MN
    Full Name:
    Yes. And nor do the US 1999 models.

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