Exhaust Size

Turbo98

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

Turbo98

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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".
 

blackfang

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

Iceman12

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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.
 

white98snake

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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
 

STNG_96

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

venoNOS

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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.
 

badass98svt

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


by the way, love the BAB
 

WyoTechMSA

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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.
 

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