Are all 02-07 WRX and STI TBEs interchangeable? - Subaru WRX Forum
 
LinkBack Thread Tools Display Modes
#1 Old 07-10-2009, 10:19 PM
WRXtuners Member
 
Join Date: Jul 2009
Location: Wisconsin
Posts: 4
xiaobei is an unknown
Are all 02-07 WRX and STI TBEs interchangeable?

I have searched a lot on this and it seems like there is no concrete answer anywhere....im sure it is common knowledge but i'm a wrx noob and i just want get this assured...thanks!


but the real question is can i put an 07 sti turboback exhaust on my 02 wrx?
xiaobei is offline  
Sponsored Links
Advertisement
 
#2 Old 07-10-2009, 10:21 PM
Moderator
 
newtothegame's Avatar
 
Join Date: Dec 2006
Location: Maryland
Posts: 6,493
Images: 4
newtothegame is known to be trustworthy and helpful newtothegame is known to be trustworthy and helpful
Send a message via Yahoo to newtothegame
You can, but if its the stock TBE, its just as useless as your exhaust. The only small difference is if its an automatic or a 5spd, but they still work the same.

Joshua
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX
Cobbtuning.com"
newtothegame is offline  
#3 Old 07-10-2009, 11:55 PM
Moderator
 
mosc's Avatar
 
Join Date: Mar 2005
Location: Pennsylvania
Posts: 6,474
Images: 7
mosc is a helpful contributing member
Garage
If you put an 07 STi turboback on an 02 WRX, it would sound a little louder but be otherwise identical. The downpipes are the same.

04 STi 16G powered lagless fun
04 WRX: SOLD
mosc is offline  
#4 Old 07-11-2009, 12:27 AM
Moderator
 
newtothegame's Avatar
 
Join Date: Dec 2006
Location: Maryland
Posts: 6,493
Images: 4
newtothegame is known to be trustworthy and helpful newtothegame is known to be trustworthy and helpful
Send a message via Yahoo to newtothegame
Mosc I agree with you mostly. There is a tab on the DP that is slightly different between the 4EAT and the 5SPD. Thats only because of the transmission. But its not enough to make a difference when mouting one or the other. And thats just stock to stock comparison, between my 2007 5SPD and my 2005 4EAT.

Joshua
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX
Cobbtuning.com"
newtothegame is offline  
#5 Old 07-11-2009, 08:07 AM
WRXtuners Member
 
Join Date: Jul 2009
Location: Wisconsin
Posts: 4
xiaobei is an unknown
it was my understanding the sti had 2.5" piping while the wrx had only 2.25".....anyways a friend is giving me his 07 STi TBE so i thought i would throw it on....im not a big fan of the stock wrx dual tip.

would adding an aftermarket downpipe to the equation change much?
xiaobei is offline  
#6 Old 07-11-2009, 08:16 AM
WRXtuners Member
 
Join Date: Jul 2009
Location: Wisconsin
Posts: 4
xiaobei is an unknown
suppose with just an aftermarket downpipe u wouldn't have anywhere to put the o2 sensor..is the right?
xiaobei is offline  
#7 Old 07-11-2009, 08:51 AM
WRXtuners Member
 
man show's Avatar
 
Join Date: Apr 2007
Location: Maryland
Posts: 3,095
Images: 2
man show is a WRX expert worth listening to man show is a WRX expert worth listening to man show is a WRX expert worth listening to
I think most aftermarket downpipes come with bungs to install the O2 sensor - I know my Cobb catted dp did. An aftermarket bellmouth style downpipe would give you a pretty decent gain in power, but you'd have to make sure you also have some kind of engine management to go along with it or you risk running into some pretty serious problems. That setup is basically referred to as "Stage 2." Check out the info on this website and I'm sure you'll find the answers to many of the questions you're probably getting ready to ask: Unabomber's Manifesto - NASIOC

John
07 WRX (Albins 5MT + Blouch 20G)
Jorge Carrillo Tuned (365 whp/340 wtq)
man show is offline  
#8 Old 07-11-2009, 09:48 AM
WRXtuners Member
 
jexeffectz's Avatar
 
Join Date: Jun 2009
Location: California
Posts: 3
jexeffectz is an unknown
Send a message via AIM to jexeffectz
Quote:
Originally Posted by man show View Post
but you'd have to make sure you also have some kind of engine management to go along with it or you risk running into some pretty serious problems.
Since he's running a bugeye, he should be fine without an e-manage. STI downpipe's are usually bigger, but you'd benefit more from a 3" aftermarket downpipe (if you're planning on getting more power). Be sure to check your state's emissions laws if you decide to go aftermarket though since there's a variety between catted and catless.
jexeffectz is offline  
#9 Old 07-11-2009, 09:53 AM
WRXtuners Member
 
Join Date: Jul 2009
Location: Wisconsin
Posts: 4
xiaobei is an unknown
wow so much info ....and debate on this topic.....it seems the best set up would be just using the STi catback on the wrx downpipe/midpipe....what do ya think? Of course i'm looking for best performance...i mean i'm getting it for free...i do understand there's almost nothing to gain but I'd like a little louder sound as well. so should i just swap the catback or go for the whole TBE...or maybe just the sti axleback...i heard the sti cat is bigger...
xiaobei is offline  
#10 Old 07-11-2009, 11:23 AM
Moderator
 
newtothegame's Avatar
 
Join Date: Dec 2006
Location: Maryland
Posts: 6,493
Images: 4
newtothegame is known to be trustworthy and helpful newtothegame is known to be trustworthy and helpful
Send a message via Yahoo to newtothegame
Even if the STI haas a bigger diameter, its only a 1/4" buy your numbers and that wont change a thing considering the design of it. Yes, it would more than likely change your sound, but thats really about it. You can run yours without EM but you wont get the full potential out of your setup. An aftermarket DP will also drop weight for you, the stock one is just covered in heat shielding. Just for reference this is a pic of my 07 stock DP, the STI design is the same:
Attached Images
 

Joshua
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX
Cobbtuning.com"
newtothegame is offline  
#11 Old 07-11-2009, 06:08 PM
Moderator
 
mosc's Avatar
 
Join Date: Mar 2005
Location: Pennsylvania
Posts: 6,474
Images: 7
mosc is a helpful contributing member
Garage
The STi's cat-back (not the full TBE) is slightly wider yes, but all that really does is make noise. It's very restrictive at the downpipe so anything beyond that isn't going to matter much.

04 STi 16G powered lagless fun
04 WRX: SOLD
mosc is offline  
#12 Old 07-13-2009, 12:17 PM
WRXtuners Member
 
turmic's Avatar
 
Join Date: Jul 2007
Location: Pennsylvania
Posts: 4,371
Images: 6
turmic is a WRX expert worth listening to turmic is a WRX expert worth listening to turmic is a WRX expert worth listening to turmic is a WRX expert worth listening to
Send a message via AIM to turmic
The opening on the STI DP is the same as newtothegames pic. So, if the opening at the turbo is the same. What does it matter if the piping is slightly larger? Still not a DP worthy of a Stage 2 upgrade. Way to restrictive....
turmic is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Trackbacks are On
Pingbacks are On
Refbacks are On