Welcome to the North American Subaru Impreza Owners Club Friday August 22, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Archives > NASIOC Archives > STi Forum Archive

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 08-09-2003, 01:03 PM   #1
SGOSWRX
Scooby Specialist
 
Member#: 10921
Join Date: Oct 2001
Location: S.W. Florida
Vehicle:
04 04 STi
12.8 @ 105 mph

Thumbs up Turbo back exhaust, a must mod for STi

I just installed a Godspeed downpipe with a Greddy EVO catback on my STi.
I wasn't expecting anything monstrous (HP wise). I knew it would make 20-30hp or so, but I didn't think I would be able to feel an improvement (seat of the pants) from the new exhaust setup.

On my 02 WRX, when I put a turboback exhaust on it I didn't really feel much of a seat of the pants increase in power?
But I had a totally different experience with my STi.

After the install I went for a nice long test drive, and I was very suprized by the seat of the pants feel. The car feels noticeably faster. I was very suprized by how much faster the car feels. The rpms also move up the tach much faster than before. So I'm more than happy with the performance improvement.

As far as noise levels, the exhaust setup is definately louder than stock but not overly loud. The car now has a real mean/bad ass sound to it.

So I would definately recommend the Goodspeed dp/Greddy EVO setup.
* Registered users of the site do not see these ads.
SGOSWRX is offline  
Old 08-09-2003, 01:11 PM   #2
SkirtBoy
Scooby Specialist
 
Member#: 11056
Join Date: Oct 2001
Chapter/Region: TXIC
Location: Sugar Land, TX
Vehicle:
2009 MB CLK 350 CPO
Black on Tan

Default Re: Turbo back exhaust, a must mod for STi

Quote:
Originally posted by SGOSWRX

So I would definately recommend the Goodspeed dp/Greddy EVO setup.
Glad to hear it ... I ordered mine on Wednesday!
SkirtBoy is offline  
Old 08-09-2003, 01:11 PM   #3
dsmperformance
Scooby Specialist
 
Member#: 15059
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Latrobe, PA
Vehicle:
2004 WRX STi
1991 TSi

Default

Sounds good! I have a full Invidia system coming this week. I can't wait!
dsmperformance is offline  
Old 08-09-2003, 01:18 PM   #4
Ulf Wafflestein
Scooby Newbie
 
Member#: 36163
Join Date: May 2003
Chapter/Region: MAIC
Location: Rockville
Vehicle:
2012 Focus Hatch
Sonic Blue

Default

Has anyone put on the HKS carbon-Ti exhaust yet? I really like that carbon muffler, and its a lot cheaper than the turbo xs exhaust. Any ideas how much power it would add?
Ulf Wafflestein is offline  
Old 08-09-2003, 01:32 PM   #5
dsmperformance
Scooby Specialist
 
Member#: 15059
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Latrobe, PA
Vehicle:
2004 WRX STi
1991 TSi

Default

Quote:
Originally posted by Ulf Wafflestein
Has anyone put on the HKS carbon-Ti exhaust yet? I really like that carbon muffler, and its a lot cheaper than the turbo xs exhaust. Any ideas how much power it would add?
The HKS carbon-ti is just a catback system, so the power gain will be very little. 5-8HP maybe. A catless downpipe is where the power gains are.
dsmperformance is offline  
Old 08-09-2003, 02:14 PM   #6
prestofilipo
Scooby Newbie
 
Member#: 18949
Join Date: May 2002
Location: Las Vegas
Vehicle:
2004 STI
Silver

Default

just put on a PDE downpipe with a HKS carbon/ti and i am very impressed. The gains are very noticeable, the car revs quicker, pulls harder and sounds really good. It never sounded/felt like this on my WRX. Turbo back is definatly a must do mod on the STI.

Anthony
prestofilipo is offline  
Old 08-09-2003, 02:51 PM   #7
boxerT
Scooby Newbie
 
Member#: 16311
Join Date: Mar 2002
Chapter/Region: TXIC
Location: Austin TX
Vehicle:
2004 STi
WR Blue

Default

Does a turbo back exhaust cause a CEL? I have been toying with the idea for my STi as well.
boxerT is offline  
Old 08-09-2003, 02:51 PM   #8
dsmperformance
Scooby Specialist
 
Member#: 15059
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Latrobe, PA
Vehicle:
2004 WRX STi
1991 TSi

Default

Quote:
Originally posted by prestofilipo
just put on a PDE downpipe with a HKS carbon/ti and i am very impressed. The gains are very noticeable, the car revs quicker, pulls harder and sounds really good. It never sounded/felt like this on my WRX. Turbo back is definatly a must do mod on the STI.

Anthony
Have you had a CEL with the PDE downpipe? The PDE downpipe has the long extension for the O2 sensor, right?
dsmperformance is offline  
Old 08-09-2003, 02:56 PM   #9
dsmperformance
Scooby Specialist
 
Member#: 15059
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Latrobe, PA
Vehicle:
2004 WRX STi
1991 TSi

Default

Quote:
Originally posted by boxerT
Does a turbo back exhaust cause a CEL? I have been toying with the idea for my STi as well.
Depends on what catless downpipe you purchase. It seems like the downpipe that are CEL free have the O2 sensor relocated away from direct exhaust flow.
dsmperformance is offline  
Old 08-09-2003, 04:01 PM   #10
SGOSWRX
Scooby Specialist
 
Member#: 10921
Join Date: Oct 2001
Location: S.W. Florida
Vehicle:
04 04 STi
12.8 @ 105 mph

Default

Quote:
Originally posted by boxerT
Does a turbo back exhaust cause a CEL? I have been toying with the idea for my STi as well.
The best part about the Godspeed downpipe is that its catless and has a small extention on the side to mount the 02 sensor. That is suppose to prevent a CEL. So far so good for me.

Other downpipes setup such as Turboxs come with a cat. The cat is in the mid pipe section of the exhaust. If you choose to run catless (race pipe mid section) with this exhaust you need to find a way to make the CEL go away. Such as a Pony Express (cel eliminator) - which I've heard don't seem to work that well with the STi.
SGOSWRX is offline  
Old 08-09-2003, 04:25 PM   #11
prestofilipo
Scooby Newbie
 
Member#: 18949
Join Date: May 2002
Location: Las Vegas
Vehicle:
2004 STI
Silver

Default

no cel with the PDE, and i have used it for about a year, on the wrx and now on the STI
prestofilipo is offline  
Old 08-09-2003, 04:45 PM   #12
bert_WRX
Scooby Specialist
 
Member#: 27143
Join Date: Oct 2002
Location: Anchorage, AK/Burbank, CA
Default

i just put my TXS turbo back from my wrx wagon on last wed the 6th...no problems so far, no cels...only thing is that i love it...

-gilbert
bert_WRX is offline  
Old 08-09-2003, 05:05 PM   #13
STiLL WILL
Scooby Specialist
 
Member#: 37581
Join Date: May 2003
Location: Correct Fitment Crew #38
Vehicle:
2004 SZ55'd STi
375whp on 91/404whp on 95

Default

bert_WRX, do you have the catpipe or the racepipe on your TXS exhaust system?

-STiLL
STiLL WILL is offline  
Old 08-10-2003, 01:04 AM   #14
guero
Scooby Newbie
 
Member#: 40576
Join Date: Jul 2003
Location: Northern Virginia
Vehicle:
2004 WRX STi
Blue/Gold

Default

got a sound clip?

Also, link plz to system.
guero is offline  
Old 08-10-2003, 03:28 AM   #15
happasaiyan
Scooby Specialist
 
Member#: 37731
Join Date: Jun 2003
Chapter/Region: MWSOC
Location: Rolling Meadows, IL
Vehicle:
'07 TL-S 6MT
'07 RDX-T

Default

happasaiyan is online now  
Old 08-10-2003, 05:51 AM   #16
bert_WRX
Scooby Specialist
 
Member#: 27143
Join Date: Oct 2002
Location: Anchorage, AK/Burbank, CA
Default

right now i have that cat in there but im going to buy the race pipe...im also using the magnaflow muffler and not the rfl one...

-gilbert
bert_WRX is offline  
Old 08-10-2003, 06:48 AM   #17
JikJak
Scooby Specialist
 
Member#: 38225
Join Date: Jun 2003
Chapter/Region: VIC
Vehicle:
749 04STI 06CLS55
RangeRoverSport s/c

Default

i see that there quite a few different setups for turbo back exhausts that are available for the sti.

can anyone tell me or point me in the right direction of all the choices we have out there and the pros and cons of each?

so far i have only been able to find solid info on the turboxs one. i don not know too much about the company and the quality of their products though. i guess there are hks and greddy kits available as well. how do they compare? what is hp and torque gain?

this will be my first subaru so i do not know too much yet about which mods and products are good. i have had an eclipse turbo and an s4 in the past so i am a little familiar with turbocharged cars but its been a while since i have learned anything about modding them, especially with modding japanese cars. the tuners for japanese and euro cars seem to be quite different.

i just want to learn more about whats available out there so i can figure out and prepare the mods i want to do to the sti.

performance will be the first priority.
JikJak is offline  
Old 08-10-2003, 08:48 AM   #18
SGOSWRX
Scooby Specialist
 
Member#: 10921
Join Date: Oct 2001
Location: S.W. Florida
Vehicle:
04 04 STi
12.8 @ 105 mph

Default

Quote:
Originally posted by JikJak
i see that there quite a few different setups for turbo back exhausts that are available for the sti.

can anyone tell me or point me in the right direction of all the choices we have out there and the pros and cons of each?

so far i have only been able to find solid info on the turboxs one. i don not know too much about the company and the quality of their products though. i guess there are hks and greddy kits available as well. how do they compare? what is hp and torque gain?

this will be my first subaru so i do not know too much yet about which mods and products are good. i have had an eclipse turbo and an s4 in the past so i am a little familiar with turbocharged cars but its been a while since i have learned anything about modding them, especially with modding japanese cars. the tuners for japanese and euro cars seem to be quite different.

i just want to learn more about whats available out there so i can figure out and prepare the mods i want to do to the sti.

performance will be the first priority.
Everyone is going to give you different advise. But to tell you the truth you really can't go wrong with most the products out there. If you have an STi I would recommend Godspeeds downpipe with your choice of catback exhaust. Your choice of catback exhaust will depend on how loud you want your exhaust. I chose the Greddy EVO catback to go with my downpipe because its one of the quietest on the market.
I got my EVO catback from www.subarustore.com
I got my Downpiple from www.godspeedinc.com

But you mentioned Turboxs. They sell a very good product. I had their stage 4 kit on my 02 WRX. You also can't go wrong using them. www.turboxs.com
They can set you up with a stealthback setup (retain your stock muffler - not the best setup for HP) to running their RL-F muffer (very loud - but makes good HP) Their exhaust systems come with a cat mid section or an optional mid section race pipe to go catless. If you choose their race pipe your going to get a CEL.

I wanted to run catless without worrying about getting a CEL. Thats why I chose the Godspeed DP. Running a cat section in your exhaust will cost you a good 6-8 hp or so.
SGOSWRX is offline  
Old 08-10-2003, 11:21 AM   #19
STiDriven
Scooby Newbie
 
Member#: 37670
Join Date: May 2003
Location: Long Island, NY
Vehicle:
04' STi
JBP/Gold BBS

Default

Does anyone have a Blitz NurSpec Catback exhaust? I don't know if you can get them for the STi yet but I'd like to know if anyone has it on their STi. I'd personally like to go with a lot of Blitz stuff.
STiDriven is offline  
Old 08-10-2003, 12:01 PM   #20
dsmperformance
Scooby Specialist
 
Member#: 15059
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Latrobe, PA
Vehicle:
2004 WRX STi
1991 TSi

Default

Quote:
Originally posted by STiDriven
Does anyone have a Blitz NurSpec Catback exhaust? I don't know if you can get them for the STi yet but I'd like to know if anyone has it on their STi. I'd personally like to go with a lot of Blitz stuff.
There is no special model for the STi. It is the same as the regular WRX.
dsmperformance is offline  
Old 08-10-2003, 02:47 PM   #21
lobelsteve
Scooby Specialist
 
Member#: 31992
Join Date: Jan 2003
Chapter/Region: South East
Location: Canton GA
Vehicle:
2007 STI
UGM

Default

So do all downpipes for 02+ WRX fit the STI?
lobelsteve is offline  
Old 08-10-2003, 02:50 PM   #22
dsmperformance
Scooby Specialist
 
Member#: 15059
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Latrobe, PA
Vehicle:
2004 WRX STi
1991 TSi

Default

Quote:
Originally posted by lobelsteve
So do all downpipes for 02+ WRX fit the STI?
Yes.
dsmperformance is offline  
Old 08-10-2003, 03:12 PM   #23
cann
Scooby Newbie
 
Member#: 8618
Join Date: Jul 2001
Location: somewhere out there
Default

how about a groupbuy for godspeed downpipe

greddy EVO, i like them, neil@morepowerracing.com selling them at 520 shipped

but kinda don't want to get them because the tip is too thin
if u know what i mean, whole thing looks like a replica

the carbon muffler is really nice, but it might hangdown too low and it does sound loud considering its muffler design

what to do......
cann is offline  
Old 08-10-2003, 03:54 PM   #24
JikJak
Scooby Specialist
 
Member#: 38225
Join Date: Jun 2003
Chapter/Region: VIC
Vehicle:
749 04STI 06CLS55
RangeRoverSport s/c

Default

ok a couple more q's

does a downpipe plus a catback exhaust make it a turbo back exhaust system? what is the layout?

turbo--->downpipe--->cat--->exhaust piping--->muffler---->tip

also how does the godspeed downpipe eliminate the CEL? does it still replace the cat with a straight pipe?

now as far as exhausts, what brands are available to choose from?

HKS
TurboXS
Greddy
Blitz

any others?

sorry for all the q's, hehe, just trying to learn.
JikJak is offline  
Old 08-10-2003, 04:24 PM   #25
cann
Scooby Newbie
 
Member#: 8618
Join Date: Jul 2001
Location: somewhere out there
Default

does the ecu know how to throw more fuel for this significant amount of air going in?
cann is offline  
 

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
WTB: Catback or turbo back exhaust, intake, HKS BOV for 2006 STI gbgallardo Private 'Wanted' Classifieds 4 12-11-2009 10:45 AM
wanted: cobb catted Turbo back exhaust and/or AP for 05 sti vivalajustin Private 'Wanted' Classifieds 0 06-04-2007 05:42 PM
USDM STi Turbo Back Exhaust & Sway bars for sale SkirtBoy Tri-State Area Forum 16 01-25-2004 12:22 PM
Turbo Back Exhaust to work with Factory STi cat back exhaust delo- Texas Impreza Club Forum -- TXIC 1 12-28-2002 11:38 PM


All times are GMT -4. The time now is 06:07 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.