Welcome to the North American Subaru Impreza Owners Club Friday October 20, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 04-13-2005, 07:24 PM   #1
Scooby Newbie
Member#: 82725
Join Date: Mar 2005
2001 Impreza RS

Default sti exhaust on an RS

i think the answer is yes, but i just wanna double check before i go and spend money on one.....will an 04 or an 05 STI stock exhaust fit on a 2001 RS? I have seen people mention it so i would assume that it is the diameter that i am looking for at 2.25 inches. Is there any customization that would have to be done to fit one on?

Thanks in advance for the feedback.

* Registered users of the site do not see these ads.
sregger is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 04-13-2005, 07:48 PM   #2
Scooby Newbie
Member#: 84530
Join Date: Apr 2005
Location: Portland, OR
2004 Impreza 2.5RS
Platinum Silver Metallic


It will not fit without some welding that needs to be done on the midpipe. The WRX and STi exhausts are signigicantly longer than that of the RS's so you would need to have a shop reweld the exhaust to fit. It would be more cost effecient to buy a used catback exhaust designed specifically for the RS.

Shoulda done a search.
jasonpham is offline   Reply With Quote
Old 04-13-2005, 07:48 PM   #3
Scooby Newbie
Member#: 61888
Join Date: May 2004
Chapter/Region: SCIC
Location: San Gabriel, CA
2003 Outback Sport
Midnight Black Pearl


i have a 04 sti axle-back on a modified wrx midpipe on my 03 OBS... sounds better and performs better (butt dyno) than the wrx axle-back.

i know for a fact, that, an sti axle-back will mate (direct fit) to a wrx mid-pipe... not exactly the questions you asked, but it's what i know.

btw, as i understand it (lots of call/visits to exhust shops), the OD (not ID) of the sti axle-back is 2.5, so figure just a bit over 2.25 (a 2.25 OD pipe is useually [in my experiance] 2.12 ID)

assuming pipe thinkness is similar you're looking at ~2.37 ID on a sti axle-back.
goNads is offline   Reply With Quote
Old 04-13-2005, 09:52 PM   #4
Scooby Newbie
Member#: 79123
Join Date: Jan 2005

i can tell you the sti muffler needs its flange cut off and repositioned or some carefull drilling to fit it on a 98rs's stock exhaust... but it does fit
JUstaszewski is offline   Reply With Quote
Old 04-13-2005, 11:00 PM   #5
Scooby Specialist
Member#: 14771
Join Date: Jan 2002
Chapter/Region: NWIC
Location: Washington's Mexico aka Tigard
02 RS
All Silver!


I have one on my 02RS. I also had a wrx midpipe modified to fit my car, and a borla header.

http://www.wsu.edu/~johnson/MVI_1144.AVI vid of start up and idle and a little reving. Don't mind the condensation. Sounds TONS better than the WRX muffler. When I started it up after bolting it up, my buddy and I were like whoa ****
ej25power is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sti exhaust on an 06 RS naku Newbies & FAQs 8 07-15-2008 11:41 AM
Can you put an 06 STi Exhaust on an 06 WRX Wagon? INDY_06_STI Interior & Exterior Modification 3 06-20-2006 09:51 AM
STi parts on an RS? AlpoRS Warranty Issues & SOA Problems 1 06-22-2005 09:39 PM
Exhaust On An RS? RSCaptain Normally Aspirated Powertrain 24 07-22-2003 09:27 PM
WRX exhaust on an RS? DoctorNick Normally Aspirated Powertrain 5 10-14-2002 11:33 AM

All times are GMT -4. The time now is 07:34 AM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.