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Old 10-03-2004, 06:19 PM   #1
vwown3d
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Default put on my exhaust 2day

finally found a way to get an exhaust on my 2005 2.5 i bought an hks exhaust from an sti and custom made an adapter for the connection to the cat. the exhaust lined up perfitic except it was short a couple inches by the cat so i had to make the bracket. i might produce these to help people out and get exhaust's on their 2.5's
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Old 10-03-2004, 06:24 PM   #2
ruskiyab
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wow, for an sti? so are we talking what, 3 inch here?
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Old 10-03-2004, 08:07 PM   #3
Evan_Ng
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any pictures?
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Old 10-04-2004, 01:37 PM   #4
mikebike357
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I'd be interested in seeing some pics of your bracket. Did the flanges line up for you? I'm fitting an '04 STi catback (2.25") to my Forester and ran into the same issue with the length. My other issue is that the flanges are angled completely opposite from eachother. The cat flange is like this: / while the STi is like this: \

Arghhh... nothing a muffler shop couldn't fix easily....
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Old 10-05-2004, 10:17 AM   #5
vwown3d
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ill try to take some pictures today. i was a little worried abou the 3" piping but so far it dosent feel like a loss maybe a little bottom end, but it gives off a nice sound, quieter than i expected which is nice. the flanges were angled a little off, but the bracket was made with each side offsed so they lined up.
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Old 10-05-2004, 01:07 PM   #6
mrruins
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I would like to know more about your experience with the 3 inch piping...
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Old 10-05-2004, 01:27 PM   #7
Nicklbrso
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You must have lost alot of low end torque(the only thing the RS has). I wouldnt go any bigger than 2.5".
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Old 10-05-2004, 08:00 PM   #8
vwown3d
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not necessarly, yea na cars need backpressure but they dont need that much. still from the cat up the pressure is the same
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Old 10-05-2004, 11:58 PM   #9
simprezl25
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i agree, i just put an 02 wrx muffler on my 02 rs and i ran into the same problem, the flanges didnt line up but all i did was get a thick bolt and a thin bolt and slide it through, i admit it is kind of cheap and afterwards i put rubber cement on the leaks (there were alot) and it seems to be fine. yes you will loose torque. but i am able to reach 130 now, before couldnt...only 105. and sounds deeper. i would like to see a picture of the adaptor that was created.
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Old 10-06-2004, 12:06 AM   #10
jamesfacts
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Quote:
Originally Posted by vwown3d
not necessarly, yea na cars need backpressure but they dont need that much. still from the cat up the pressure is the same
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Old 10-06-2004, 12:43 AM   #11
rabbitnutz
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he's saying backpressure is created from catalytic converter to the exhuast ports on the head....and through the magic of science...low end tourque is there....when there is no backpressure, less low end tourque
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Old 10-06-2004, 12:46 AM   #12
jamesfacts
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Yeah, I understand that... but the axleback cetainly affect backpressure too.
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Old 10-06-2004, 12:53 AM   #13
rabbitnutz
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oh definately. everything does.

even the headliner color.

that's right. EVERYTHING.
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