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360 Cat bypass pipes

Discussion in '360/430' started by dbdreams, Aug 22, 2020.

  1. dbdreams

    dbdreams Karting

    Nov 6, 2003
    166
    Hayden, Alabama, USA
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    David W. Burnett, Jr.
    Does anyone make cat bypass pipes that will work with the stock exhaust?
     
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  3. one4torque

    one4torque Formula 3

    May 20, 2018
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    Pretty sure they all do.......
     
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  4. dbdreams

    dbdreams Karting

    Nov 6, 2003
    166
    Hayden, Alabama, USA
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    David W. Burnett, Jr.
    Seems like a good place to start to eliminate the issue of the cat insides coming apart and being sucked into the engine I have read about

    Sent from my SM-T720 using FerrariChat.com mobile app
     
  5. 24000rpm

    24000rpm F1 Rookie
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    thats precat. OP is talking about main cat, hence the "pipe"

     
  6. dbdreams

    dbdreams Karting

    Nov 6, 2003
    166
    Hayden, Alabama, USA
    Full Name:
    David W. Burnett, Jr.
    OK, my bad so the it's the pre cat that is the problem.

    Is the pre cat part of the manifold or a separate piece?
     
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  8. 24000rpm

    24000rpm F1 Rookie
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    yes, its inside of the exhaust manifold, aka header

     
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  9. RedNeck

    RedNeck F1 Veteran
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    Jul 8, 2016
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    There are few issues with the catalytic converters themselves, but due to heat/performance/price, many will opt to put an aftermarket system in. The problem that you are referring to are the precats in the exhaust manifolds themselves, that affect 2000-2004 360's. To eliminate that possibility you can get a set of aftermarket headers, but you will probably have to deal with a CEL or get the ECU programmed. The headers typically run a few grand, but you will be virtually eliminating an issue that could cause a much more expensive engine rebuild down the road. I believe someone is selling a set in the classifieds right now.
     
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  10. 24000rpm

    24000rpm F1 Rookie
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    or buy challenge car headers. and also eliminate the 2nd air injection, in which case passing smog could be an issue in the US.


     
  11. RedNeck

    RedNeck F1 Veteran
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    Good call. I believe you may still need an ECU tune for that.
     
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  13. dbdreams

    dbdreams Karting

    Nov 6, 2003
    166
    Hayden, Alabama, USA
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    David W. Burnett, Jr.
    Luckily here in Alabama we don't have smog tests so I should be ok whatever I choose.

    Thanks for the info and replies all
     
  14. Skidkid

    Skidkid F1 Veteran
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    Aug 25, 2005
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    Smog checks aside. Without a tune it would still have a CEL all of the time so you wouldn't know when there is a real issue.
     
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  15. dbdreams

    dbdreams Karting

    Nov 6, 2003
    166
    Hayden, Alabama, USA
    Full Name:
    David W. Burnett, Jr.
    Will the tune not adjust for the CEL issue?
     
  16. Skidkid

    Skidkid F1 Veteran
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    That's a complicated question. Generally a tune just turns off the sensor & warnings. A few can alter the sensitivity and/or range of the sensors so they continue to work. Theoretically retuned is better for everyday use; it produces power more uniformly across a wide variety of temp and other conditions.
     
  17. RedTaxi

    RedTaxi Formula 3
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    Mar 1, 2012
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    My challenge headers threw a CEL straight away. O2 extenders cured it. 3 years now.
     
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  18. dbdreams

    dbdreams Karting

    Nov 6, 2003
    166
    Hayden, Alabama, USA
    Full Name:
    David W. Burnett, Jr.
    I wonder does the challenge headers have the same precat issues?

    Sent from my SM-T720 using FerrariChat.com mobile app
     
  19. Skidkid

    Skidkid F1 Veteran
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    Aug 25, 2005
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    No, they do not have precats. BUT don't confuse CS with Challenge. They are different things.
     
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