1999 355 secondary cat-By-pass pipe question?? | FerrariChat
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1999 355 secondary cat-By-pass pipe question??

Discussion in '348/355' started by michael craig, Feb 9, 2015.

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  1. michael craig

    michael craig Karting

    Jan 28, 2013
    84
    NYC-Area
    Full Name:
    Mike
    #1 michael craig, Feb 9, 2015
    Hi 355 Brothers and Sistas LOL!!
    I have a 1999 355 GTS Stick , with Fabspeed Headers, Fabspeed Cats, 02 Extenders carbon fiber air-boxes and a TUBI Exhaust . What is the school of thought on adding --Secondary cat bypass pipes???? Would it make a difference?
    Thanks!! Mike in Frozen New Jersey :)))
     
  2. Robin

    Robin F1 Rookie

    Nov 1, 2003
    2,931
    Arlington, VA
    #2 Robin, Feb 10, 2015
    Doesn't make much of a difference at all. Slight change in sound maybe, but unless the existing one is falling apart or you just really want to change something, it's not really worth it. FWIW I had the Kreissieg pipes on mine.
     
  3. michael craig

    michael craig Karting

    Jan 28, 2013
    84
    NYC-Area
    Full Name:
    Mike
    #3 michael craig, Feb 10, 2015
    Thanks for your input Robin :)
     
  4. Shootfighter65

    Shootfighter65 Formula 3

    May 13, 2014
    1,372
    Charleston SC
    Full Name:
    Randy..alluneedtokno
    #4 Shootfighter65, Feb 10, 2015
    Why would you need O2 extenders on fabspeed cats? I used them on test pipes but going back to hyper-flows its not necessary. Fabspeed cats shouldnt need them if they work properly.
     
  5. michael craig

    michael craig Karting

    Jan 28, 2013
    84
    NYC-Area
    Full Name:
    Mike
    #5 michael craig, Feb 10, 2015
    I was told that by using the 02 extenders ($150.00) big deal I think it makes me feel better LOL! They are supposed to help trick the computer when measuring the new air flow , going from 600 cell to 200 cell cats? So I don't get any idiot lights.
     

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