Welcome to the North American Subaru Impreza Owners Club Friday July 11, 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 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.
Reply
 
Thread Tools Display Modes
Old 04-20-2013, 08:02 AM   #1
TonyT88
Scooby Newbie
 
Member#: 249621
Join Date: Jun 2010
Chapter/Region: NESIC
Location: concord
Vehicle:
2007 impreza 2.5i
black

Smile boxer rumble for non turbo

done alot of research and video watching, but i think i found the route im gunna go. here it is, tell what you think. http://boxer4racing.3dcartstores.com...-07_p_860.html


here a video too from someone that has done this
* Registered users of the site do not see these ads.
TonyT88 is offline   Reply With Quote
Old 04-20-2013, 10:55 AM   #2
Duvanator
Scooby Newbie
 
Member#: 217257
Join Date: Jul 2009
Location: Niagara Falls, Canada
Vehicle:
2008 2.5i hatch
Satin White Wrap

Default

Sounds good, but DAM that's expensive! lol
Duvanator is offline   Reply With Quote
Old 04-20-2013, 01:59 PM   #3
PA-Outback2000
Scooby Specialist
 
Member#: 161832
Join Date: Oct 2007
Chapter/Region: Tri-State
Location: PA
Vehicle:
2000 Outback Limited
Black

Default

i would go with... http://boxer4racing.3dcartstores.com...-07_p_643.html

that's basically the same one i have. the only difference is that i have a random technology high-flow cat that is a dual cat system and i have the stromung "regular" single tip, not the "XA' tip.

the link you gave in the post has the stromung single cat system which is more likely to throw a CEL, especially with a header. i would definitely get one of the o2 sensor spacers no matter which kit you go with.

search "daios subaru" on youtube to get an idea of what my set-up sounds like. let me know if you have any questions.

p.s. - dale at boxer4racing is a great guy and is very knowledgeable in the subaru field. i have dealt with them a lot and have never failed me.
PA-Outback2000 is offline   Reply With Quote
Old 04-20-2013, 07:22 PM   #4
Chuckls
Scooby Specialist
 
Member#: 280696
Join Date: Apr 2011
Chapter/Region: MWSOC
Location: Kentuckiana
Vehicle:
2005 WRX
OBP

Default

I have the apexi with a Borla header...Sounds ****ing tits. Best money I've spent.
Chuckls is offline   Reply With Quote
Old 04-22-2013, 11:08 AM   #5
Van07
Scooby Newbie
 
Member#: 354040
Join Date: Apr 2013
Chapter/Region: Tri-State
Location: Camp Lejeune =[
Vehicle:
07 impreza 2.5i
newport blue

Default

heres mine I havent taken a video of it idling and perrring (its obnoxiously loud and rumbles) but heres the it after the dyno

<iframe src="https://www.facebook.com/video/embed?video_id=561851767169200" width="854" height="480" frameborder="0"></iframe>

Agency Power unequal length header, TurboXS catalytic-converter-back exhaust system, 3.00" high-flow catalytic converter, and custom fabricated it all to fit and function. short ram cold air intake... all in all gained 25awhp... up next cams.. and positive displacement supercharger...
Van07 is offline   Reply With Quote
Old 04-22-2013, 08:45 PM   #6
blk6s
Scooby Newbie
 
Member#: 200057
Join Date: Jan 2009
Location: near St Paul, MN
Vehicle:
2013 Impreza 2.0i
RalliSported RomRaided

Default

Quote:
Originally Posted by Van07 View Post
Agency Power unequal length header, TurboXS catalytic-converter-back exhaust system, 3.00" high-flow catalytic converter, and custom fabricated it all to fit and function. short ram cold air intake... all in all gained 25awhp...
Was the stock baseline run made on the same day on the same dyno?

Last edited by blk6s; 04-22-2013 at 09:15 PM.
blk6s is offline   Reply With Quote
Old 04-22-2013, 11:50 PM   #7
klaus_b2
Scooby Newbie
 
Member#: 318411
Join Date: Apr 2012
Chapter/Region: South East
Location: North Carolina
Default

Quote:
Originally Posted by Van07 View Post
heres mine I havent taken a video of it idling and perrring (its obnoxiously loud and rumbles) but heres the it after the dyno

<iframe src="https://www.facebook.com/video/embed?video_id=561851767169200" width="854" height="480" frameborder="0"></iframe>

Agency Power unequal length header, TurboXS catalytic-converter-back exhaust system, 3.00" high-flow catalytic converter, and custom fabricated it all to fit and function. short ram cold air intake... all in all gained 25awhp... up next cams.. and positive displacement supercharger...
was that at national speed? and how did you get a 25hp gain? i have a full exhaust, injen cai, and accessport. Ive only had my car tuned with the ap though, but i can tell a difference from stock, but i know i didnt gain anywhere near 25hp lol..maybe 5-10 if im lucky
klaus_b2 is offline   Reply With Quote
Old 04-23-2013, 07:19 AM   #8
VIsubi
Scooby Specialist
 
Member#: 187834
Join Date: Aug 2008
Vehicle:
06 2.5i impreza
Red

Default

Do not go Tsudo I did leaks. Had to get remflex e haust gaskets works great now.
Rumbles but you do know the reason for rumble in wrx and sti is the Turbo exhausting not just the motor. Unless your turbo it'll never sound the same.

Close but not the same
VIsubi is offline   Reply With Quote
Old 04-23-2013, 07:21 AM   #9
VIsubi
Scooby Specialist
 
Member#: 187834
Join Date: Aug 2008
Vehicle:
06 2.5i impreza
Red

Default

AP can tune for more HP than safe you do know that right. If you had standard maps and not a custom tune, theirs your reason. Timing is probably Advanced and running rich
VIsubi is offline   Reply With Quote
Old 04-23-2013, 12:53 PM   #10
Van07
Scooby Newbie
 
Member#: 354040
Join Date: Apr 2013
Chapter/Region: Tri-State
Location: Camp Lejeune =[
Vehicle:
07 impreza 2.5i
newport blue

Default

Quote:
Originally Posted by klaus_b2 View Post
was that at national speed? and how did you get a 25hp gain? i have a full exhaust, injen cai, and accessport. Ive only had my car tuned with the ap though, but i can tell a difference from stock, but i know i didnt gain anywhere near 25hp lol..maybe 5-10 if im lucky
im pretty sure i got the massive power gains by going with a high flow catalytic converter, thus not restricting as much air flow. but im guessing the headers and basically a straight 3" pipe helped enormously as well. Its a considerably noticeable power gain. They also open source tuned it which I would say is a must if your going to do bolt on upgrades. and yes it was .
Van07 is offline   Reply With Quote
Old 04-23-2013, 12:56 PM   #11
Van07
Scooby Newbie
 
Member#: 354040
Join Date: Apr 2013
Chapter/Region: Tri-State
Location: Camp Lejeune =[
Vehicle:
07 impreza 2.5i
newport blue

Default

No it was done the day i brought it in Stock and again after upgrades and tune
Quote:
Originally Posted by blk6s View Post
Was the stock baseline run made on the same day on the same dyno?
Van07 is offline   Reply With Quote
Old 04-23-2013, 01:34 PM   #12
fmars62
Scooby Specialist
 
Member#: 290517
Join Date: Aug 2011
Chapter/Region: Tri-State
Location: Goshen, NY
Vehicle:
2008 Impreza 2.5i
Dark Grey Metallic

Default

i would just get the rallisport racing header.
fmars62 is offline   Reply With Quote
Old 04-23-2013, 02:40 PM   #13
naCAnItihS
Scooby Specialist
 
Member#: 259481
Join Date: Sep 2010
Chapter/Region: NESIC
Location: South Coast, MA
Vehicle:
2002 WRX STI Wagon
MBP

Default

Van07 did you just modify a turbo header for that setup? cuz thats what it looks like.


I am running the Tsudo UEL w/ single HFC pipe and OBX catback. All direct bolt on

Header/HFC combo $330 shipped and OBX catback $295 shiped

It doesnt leak if you use a new stock donut gasket along with the 2 bolt flange gasket they give you.

naCAnItihS is offline   Reply With Quote
Old 04-23-2013, 03:23 PM   #14
Rudgers73
Scooby Newbie
 
Member#: 141433
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Rochester, NY
Vehicle:
2006 Impreza 2.5i
Obsidian Black

Default

Quote:
Originally Posted by naCAnItihS View Post
Van07 did you just modify a turbo header for that setup? cuz thats what it looks like.


I am running the Tsudo UEL w/ single HFC pipe and OBX catback. All direct bolt on

Header/HFC combo $330 shipped and OBX catback $295 shiped
Well, that's the thing with 06 and newer subarus, though. You can't get a direct bolt-on header and cat for $330.
Rudgers73 is offline   Reply With Quote
Old 04-23-2013, 04:03 PM   #15
naCAnItihS
Scooby Specialist
 
Member#: 259481
Join Date: Sep 2010
Chapter/Region: NESIC
Location: South Coast, MA
Vehicle:
2002 WRX STI Wagon
MBP

Default

hmm IC... Whats the actual difference between them?

Looks like they changed the routing of the header. But if one is to replace the entire thing (header back exhaust) I dont see a huge issue. Most companies would make the part to fit with the stock components/routing.

Last edited by naCAnItihS; 04-23-2013 at 04:11 PM.
naCAnItihS is offline   Reply With Quote
Old 04-23-2013, 04:42 PM   #16
Rudgers73
Scooby Newbie
 
Member#: 141433
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Rochester, NY
Vehicle:
2006 Impreza 2.5i
Obsidian Black

Default

Quote:
Originally Posted by naCAnItihS View Post
hmm IC... Whats the actual difference between them?

Looks like they changed the routing of the header. But if one is to replace the entire thing (header back exhaust) I dont see a huge issue. Most companies would make the part to fit with the stock components/routing.
Yeah, you can replace the whole thing, or you can just use an older style borla (or whatever) header and replace the cat section with an older one, but then there are CEL issues. In 06 they also changed some of the engine controls to use the rear o2 sensor for (I think..?) fuel trim. So if you just put a bung extender in to fix the problem that some older cars would get from time to time, it doesn't work. You will have constant CELs. The only thing that seems to work without having to half-ass something with your emission control parts are the Rallisport headers. And they are about $600 :/
Rudgers73 is offline   Reply With Quote
Old 04-23-2013, 05:31 PM   #17
Van07
Scooby Newbie
 
Member#: 354040
Join Date: Apr 2013
Chapter/Region: Tri-State
Location: Camp Lejeune =[
Vehicle:
07 impreza 2.5i
newport blue

Default

Quote:
Originally Posted by naCAnItihS View Post
Van07 did you just modify a turbo header for that setup? cuz thats what it looks like.


I am running the Tsudo UEL w/ single HFC pipe and OBX catback. All direct bolt on

Header/HFC combo $330 shipped and OBX catback $295 shiped

It doesnt leak if you use a new stock donut gasket along with the 2 bolt flange gasket they give you.

01 Forester with header back exhaust - YouTube
its a STI replica header, so yes. I have been however having CEL problems its throwing a P2096 which says post catalytic fuel trim bank 1 system running to lean. I think due to my set up im having to much air retuning to my engine.. because everything i have read says its either a vacuum leak or o2 sensors... and im almost 100% its neither.
Van07 is offline   Reply With Quote
Old 04-23-2013, 06:17 PM   #18
klaus_b2
Scooby Newbie
 
Member#: 318411
Join Date: Apr 2012
Chapter/Region: South East
Location: North Carolina
Default

Quote:
Originally Posted by Van07 View Post
its a STI replica header, so yes. I have been however having CEL problems its throwing a P2096 which says post catalytic fuel trim bank 1 system running to lean. I think due to my set up im having to much air retuning to my engine.. because everything i have read says its either a vacuum leak or o2 sensors... and im almost 100% its neither.
yeah i had the same problem. I had an exhaust shop put another cat in my exhaust and it hasnt came back since. and i didnt really notice a power loss, it actually felt smoother...didnt wanna do it, but had to to pass inspection haha
klaus_b2 is offline   Reply With Quote
Old 04-24-2013, 07:34 AM   #19
Rudgers73
Scooby Newbie
 
Member#: 141433
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Rochester, NY
Vehicle:
2006 Impreza 2.5i
Obsidian Black

Default

Quote:
Originally Posted by Van07 View Post
its a STI replica header, so yes. I have been however having CEL problems its throwing a P2096 which says post catalytic fuel trim bank 1 system running to lean. I think due to my set up im having to much air retuning to my engine.. because everything i have read says its either a vacuum leak or o2 sensors... and im almost 100% its neither.

refer to my post above. It says your running too lean because the rear o2 sensor's placement has been modified with relation to the front one, and if changing the fuel trim isn't showing any response in the rear sensor it assumes that the rear o2 sensor is goofed up. I would guess you are probably actually running rich. How's your gas mileage? How do your spark plugs look?
Rudgers73 is offline   Reply With Quote
Old 04-24-2013, 08:12 AM   #20
Van07
Scooby Newbie
 
Member#: 354040
Join Date: Apr 2013
Chapter/Region: Tri-State
Location: Camp Lejeune =[
Vehicle:
07 impreza 2.5i
newport blue

Default

My gas milage has been ****y since I flashed my ecu a few days ago to pass inspection (and it did, drove it 40 miles hard on the highway ) my spark plugs are definitely due for a change its been 40k since I last did them -.-
Van07 is offline   Reply With Quote
Old 04-24-2013, 08:39 PM   #21
jamesonp16
Scooby Newbie
 
Member#: 347149
Join Date: Feb 2013
Chapter/Region: NESIC
Vehicle:
2007 impreza 2.5
red

Default UEL headers

Hey tony check out the rallisport UEL headers if you havnt already!!! thats what im going with for my car. they are made just for 06+ 2.5i. they are direct bolt on no modification required ( can be installed by yourself in about 2 hours), built in high flow cat, and o2 sensor bung holes already drilled at either side of the cat. the quality id really good and they sound even better. check out the thread on them, there is a lot of good exhaust clips on the thread
jamesonp16 is offline   Reply With Quote
Old 04-25-2013, 08:01 AM   #22
TonyT88
Scooby Newbie
 
Member#: 249621
Join Date: Jun 2010
Chapter/Region: NESIC
Location: concord
Vehicle:
2007 impreza 2.5i
black

Default

ya i did check those, i don't want to be charge for something i cant install for 3 months. cuz i have to wait, but i'll keep my options open tho. did you order them already for your car.
TonyT88 is offline   Reply With Quote
Old 04-25-2013, 06:28 PM   #23
Bubakanush
Scooby Newbie
 
Member#: 209975
Join Date: Apr 2009
Chapter/Region: Tri-State
Location: Egg Harbor Twp, South Jersey
Vehicle:
2006 Impreza 2.5i
SGM

Default

Yeah same dilemma here. I really want the rallisport headers but even if I ordered them now I wouldn't get them until nearly the end of summer! I would wait a month, but 3+ is really a bit much. But I understand it's necessary because each header is handmade uniquely for the customer
Bubakanush is offline   Reply With Quote
Old 04-25-2013, 08:06 PM   #24
jamesonp16
Scooby Newbie
 
Member#: 347149
Join Date: Feb 2013
Chapter/Region: NESIC
Vehicle:
2007 impreza 2.5
red

Default rallisport headers

no I have not ordered them yet, i need to save some more money first lol.... im not sure if the waiting period is 3 months still it could be less. i mean i can understand not wanting to wait but they are awesome quality and i think they are worth the wait. from what ive been reading if the borla type headers are not installed properly they can leak and what not. I mean for me the ease of installation and the custom made specially for your car wins it for me. especially cuz its something i can do myself, i enjoy working on my car.

i looked into the borla with modification but i live in mass and they are strict with emission laws now, plus its my daily so i want a catalytic converter and i dont want to have to find a shop that will look the other way and pass me without a cat lol. going the borla route with a OEM or highflow cat plus installation at an exhaust shop they are essentially going to cost the same.

cant wait to order my rallisport headers!!!! and they sound awesome
jamesonp16 is offline   Reply With Quote
Old 04-25-2013, 10:32 PM   #25
Steve2.5i
Scooby Specialist
 
Member#: 293006
Join Date: Aug 2011
Chapter/Region: SCIC
Location: San Diego
Vehicle:
2010 Impreza 2.5i
Newport Blue

Default

Quote:
Originally Posted by TonyT88 View Post
ya i did check those, i don't want to be charge for something i cant install for 3 months. cuz i have to wait, but i'll keep my options open tho. did you order them already for your car.
In the long run the rallisports will pay off. If ur borla reps were to crack ur money is out the window. If the rallisports were to have any defect at all Mike from rallisport would pay shipping both ways n fix it free of charge. Where else can u get the awesome craftsmanship that he provides and outstanding customer service. If u look at the big picture 3 months ain't **** for what u get from rallisport but that's just my opinion. Not to mention its 100% bolt on, no custom Fab or bull****ting. The o2 sensors r in the original locations but to each their own its your car not mine . As an owner of the headers I can say without hesitation that they are 100% worth the money n time if u seek the rumble.

Last edited by Steve2.5i; 04-25-2013 at 10:44 PM.
Steve2.5i is offline   Reply With Quote
Reply

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


All times are GMT -4. The time now is 03:28 AM.


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.