Exhaust Size

Turbo98 · Jan 25, 2006

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

19clearcobra96 · Jan 25, 2006

2.25"

Matt94GT · Jan 25, 2006

do any of you cobra guys run 3"?

Turbo98 · Jan 25, 2006

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".

Matt94GT · Jan 25, 2006

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

blackfang · Jan 25, 2006

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

badass98svt · Jan 25, 2006

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

exactly

Iceman12 · Jan 29, 2006

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.

NITROUSINJECTED · Feb 1, 2006

i have a 3" setup

Matt94GT · Feb 1, 2006

sweet got exhaust clips?

NITROUSINJECTED · Feb 2, 2006

yeah ill try and get it posted up tommorw

Lightning Struck · Feb 10, 2006

waiting for your post

white98snake · Feb 14, 2006

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

Lightning Struck · Feb 19, 2006

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

STNG_96 · Apr 5, 2006

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

Lightning Struck · Apr 5, 2006

STNG_96 said:
2.5" is good, the camaros and TA's have 3 inche setups because they are not true dual setups.

Yea..................wana Bees ;D ;D

venoNOS · May 11, 2006

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 · May 18, 2006

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

by the way, love the BAB

WyoTechMSA · Jun 11, 2006

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.