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Old 07-20-2019, 10:57 PM   #1
thesleekninja
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Question 2007 Subaru Impreza 2.5i

Hello all,

I have been searching and cannot find any good answer. I am trying to find out whether or not a full exhaust from a 2005 Subaru Impreza 2.5RS will fit directly on a 2007 Subaru Impreza 2.5i. The items I am looking at are as follows:

UEL Headers and Hi-Flow Cat:https://www.ebay.com/itm/TSUDO-1997-...53.m1438.l2649

SR.S Catback Exhaust:https://www.ebay.com/itm/SR-S-SUBARU...8AAOxyFiRRyhYt

Any help will be much appreciated. Thanks!!
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Old 07-23-2019, 09:27 PM   #2
Brandon Tchida
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I believe that the exhaust manifolds changed after 05. That was the last year the RSís had nice simple SOHC motors without MAFís and other extra sensors.

So to answer, Iíd say no. Best bet would be to find a stock one from an 07 and see if it fits yours.
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Old 07-23-2019, 10:41 PM   #3
thesleekninja
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Quote:
Originally Posted by Brandon Tchida View Post
I believe that the exhaust manifolds changed after 05. That was the last year the RSís had nice simple SOHC motors without MAFís and other extra sensors.



So to answer, Iíd say no. Best bet would be to find a stock one from an 07 and see if it fits yours.


The reason I would be wanting to change it from the stock 07 is that I want it to have the rumble. The stock 2.5i doesnít have the rumble.
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Old 07-23-2019, 10:46 PM   #4
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Quote:
Originally Posted by thesleekninja View Post
The reason I would be wanting to change it from the stock 07 is that I want it to have the rumble. The stock 2.5i doesn’t have the rumble.

If you are after the rumble on an 06/07 then check out this video. They take a WRX header and modify it to fit with the rest of the system. It does require welding and some fabrication though.

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Old 07-23-2019, 10:51 PM   #5
thesleekninja
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Quote:
Originally Posted by Camel108 View Post
If you are after the rumble on an 06/07 then check out this video. They take a WRX header and modify it to fit with the rest of the system. It does require welding and some fabrication though.

https://www.youtube.com/watch?v=CFPfcIYlqCA


Thereís also this video where the guy bought the 97-05 headers and hi flo cat and they bolted right up.

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Old 07-23-2019, 10:53 PM   #6
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If Iím not mistaken arenít the 05 RS and the 07 2.5i the same engines?
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Old 07-23-2019, 11:59 PM   #7
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Quote:
Originally Posted by thesleekninja View Post
Thereís also this video where the guy bought the 97-05 headers and hi flo cat and they bolted right up.

https://youtu.be/tKf3o2ERFPY

From what I understand he bought the cat by itself (circled red) and then had custom piping made (blue) so that it would bolt up to the 97-05 headers.



To be able to use these headers you need to have the cat/midpipe pointing to the side of the car like in this picture of my car which is an Australian Spec 2006 Impreza 2.0i and has the same configuration as a 97-05.



This means you have two options either make a custom midpipe/cat section like in your video to fit the 97-05 headers or modify some WRX headers to bolt up to your factory midpipe.
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Old 07-24-2019, 12:02 AM   #8
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Quote:
Originally Posted by thesleekninja View Post
If Iím not mistaken arenít the 05 RS and the 07 2.5i the same engines?
Yes I'm pretty sure you are right however their exhaust configurations are different.

From Wikipedia
Quote:
EJ253
SOHC - 121 kW (162 hp; 165 PS) @ 5600 rpm, 226 N⋅m (167 lb⋅ft) torque @ 4400 rpm. Intake volume is regulated by use of a MAF sensor, unlike the EJ251 which is regulated by a MAP sensor.

I-Active valves (VVL intake side) on 2006 models which have ISO 175 hp (130 kW; 177 PS) @ 5600 rpm, 229 N⋅m (169 lb⋅ft) torque @ 4400 rpm.

PZEV-equipped 2007 and up models have ISO 173 hp (129 kW; 175 PS) @ 5600 rpm, 225 N⋅m (166 lb⋅ft) torque @ 4000 rpm Compression ratio is 10.0:1.

The EJ253 has an open deck design.

Impreza 2.5RS 99+
Impreza 04-11
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Old 07-24-2019, 12:20 AM   #9
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In this video he doesnít say anything about having to modify anything but his existing midpipe.

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Old 07-24-2019, 12:20 AM   #10
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EDIT

Sorry turns out I might be wrong I didn't check the link to the cat in the first post

If you order both of those parts you may still have to make some modifications after the cat as the SR*S is probably compatible with the stock cat rather than the aftermarket one.
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Old 07-24-2019, 12:22 AM   #11
thesleekninja
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Quote:
Originally Posted by Camel108 View Post
EDIT



Sorry turns out I might be wrong I didn't check the link to the cat in the first post



If you order both of those parts you may still have to make some modifications after the cat as the SR*S is probably compatible with the stock cat rather than the aftermarket one.


Looks as if the flanges would all match up.
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Old 07-24-2019, 12:26 AM   #12
Camel108
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Quote:
Originally Posted by thesleekninja View Post
Looks as if the flanges would all match up.
Yeah the flanges look right as long as they actually meet up in the right spot under the car which I'm not sure about.
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Old 07-24-2019, 12:28 AM   #13
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Quote:
Originally Posted by Camel108 View Post
Yeah the flanges look right as long as they actually meet up in the right spot under the car which I'm not sure about.


I would think that 99% of the stuff under the 02-07ís would be relatively the same.
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Old 07-24-2019, 12:28 AM   #14
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You should be right though because the TSUDO is compatible with the stock catback and the SR*S is compatible with the stock header.
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Old 07-24-2019, 12:29 AM   #15
thesleekninja
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Quote:
Originally Posted by Camel108 View Post
You should be right though because the TSUDO is compatible with the stock catback and the SR*S is compatible with the stock header.


I guess I will ultimately just have to see when it is purchased.
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Old 07-24-2019, 12:33 AM   #16
Camel108
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Just for your reference here are the exhaust diagrams for the 05 and the 07 impreza from the service manuals.

05:



07:


Good Luck
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Old 07-27-2019, 07:11 AM   #17
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Before looking for the transmission, trim. You can get a haircut here https://menshaircuts.com/pompadour-hairstyle/. After all, the better haircut, the better the car goes.
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Old 07-27-2019, 11:36 AM   #18
thesleekninja
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Quote:
Originally Posted by larryymoore View Post
Before looking for the transmission, trim. You can get a haircut here https://menshaircuts.com/pompadour-hairstyle/. After all, the better haircut, the better the car goes.


What?
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