Exhaust Size

Discussion in 'The Garage' started by Turbo98, Jan 25, 2006.

  1. Turbo98

    Turbo98 New Member

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    Does anybody know the pipe diameter of the stock H pipe on a 98 Cobra?
    Thanks.
     
  2. 19clearcobra96

    19clearcobra96 New Member

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    2.25"
     
  3. Matt94GT

    Matt94GT Legend SN95 Supporter Retired Staff

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    do any of you cobra guys run 3"?
     
  4. Turbo98

    Turbo98 New Member

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    I am running 2 1/2". I would think 3" would lower your exhaust velocity unless you are running 800+rwhp or something. I am looking to make 700+rwhp with the 2 1/2".
     
  5. Matt94GT

    Matt94GT Legend SN95 Supporter Retired Staff

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    well I know a bunch of camaro guys do 3" just never really seen it that often on stangs.
     
  6. blackfang

    blackfang Active Member

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    2.5" anything more on a NA car will kill the backpressure.
     
  7. badass98svt

    badass98svt Well-Known Member

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    exactly
     
  8. Iceman12

    Iceman12 New Member

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    i've seen lots of 3" cat backs on 03-04 Cobras,a nd some GT's and such, but almost all of them have 2.5" h/x pipes i believe.
     
  9. NITROUSINJECTED

    NITROUSINJECTED Active Member

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    i have a 3" setup
     
  10. Matt94GT

    Matt94GT Legend SN95 Supporter Retired Staff

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    sweet got exhaust clips?
     
  11. NITROUSINJECTED

    NITROUSINJECTED Active Member

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    yeah ill try and get it posted up tommorw
     
  12. Lightning Struck

    Lightning Struck Legend

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    waiting for your post
     
  13. white98snake

    white98snake New Member

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    i drove a 97 snake with a 3in cat back and it sounds like garbage and their was 0 backpressure, might aswell run no catback in my opinon unless ur pushing over 750 or running a big downpipe on a turbo set up a 2.5 in is more then sufficient
     
  14. Lightning Struck

    Lightning Struck Legend

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    2.5 is what just about all street cars need, except for the BIG HP cars
     
  15. STNG_96

    STNG_96 Active Member

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    2.5" is good, the camaros and TA's have 3 inche setups because they are not true dual setups.
     
  16. Lightning Struck

    Lightning Struck Legend

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    Yea..................wana Bees ;D ;D
     
  17. venoNOS

    venoNOS New Member

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    Yeah It would definately be over kill. 3.5 Tips are great to run but having your mid pipe 3 or more would seriously put a damper on your performance being n/a. I got the long tubes with bbk 2.5 o/r h with stock Cobra tail pipes and I love it. Turbo98 is right,unless your running 700 to 800 hp's.
     
  18. badass98svt

    badass98svt Well-Known Member

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    yes venonos, 4v's + O/R H + Longtubes is incredible sounding!


    by the way, love the BAB
     
  19. WyoTechMSA

    WyoTechMSA Well-Known Member

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    Yea a 4v does not need 3 inch exhaust. Like even my SLP exhaust kills some of my low end punch but it really helps open up up top. I guarantee you if I didnt have gears the SLP wouldve actually hurt my car more than helped.