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Old 11-05-2011, 01:03 AM   #1
hella_sti
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Member#: 139289
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: ND
Vehicle:
2003 WRX Wagon
PSM

Default muffler bypass

So I installed a cobb exhaust and it looks great on my wagon but is too quiet compared to my hks carbon ti, I was thinking about getting a 2.75 or 3inch section of pipe and sliding it into the "muffler" section to get it a bit louder while looking mostly stock. I'll be able to take it off whenever I want and could weld a nut on the inside of the pipe to keep it from coming loose. Any ideas? Would this work or not? I could even tune how loud the insert would be by shortening or lengthening how far it reaches into the muffler section.
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Old 11-05-2011, 11:02 AM   #2
axleon2
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Chapter/Region: RMIC
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JBP

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Yes it's been done before. I know of a few guys here locally in Utah that have done.
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Old 11-05-2011, 08:38 PM   #3
wantsti
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I've have this done and just slide it in and tighten the nut down. Search my threads there is a pic somewhere
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Old 11-05-2011, 10:07 PM   #4
03aksuby
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Location: Ottumwa, IA & Iowa City, IA
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WRB

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Have you looked into a cut-out?
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Old 11-05-2011, 10:37 PM   #5
Joshwrx04
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there a video on youtube of a black sti that has this done!
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Old 12-25-2011, 03:32 PM   #6
Chandy69
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wheres these videos i wanna see
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Old 12-26-2011, 03:18 AM   #7
reid-o
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Heres the setup I have.

It's a boost activated cutout linked to a stock muffler.
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Old 12-26-2011, 07:33 PM   #8
lbp287
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id go boost cutout or waldron muffler. more easily adjustable.
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Old 07-05-2012, 01:05 PM   #9
txsc2216
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Quote:
Originally Posted by axleon2 View Post
Yes it's been done before. I know of a few guys here locally in Utah that have done.
how did they do the piping? sorry for posting on an old thread but i want to do this fab to my exhaust
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Old 01-14-2013, 06:42 PM   #10
red_wing_2121
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I can't seem to fit a 2.75" pipe into my cobb exhaust... The perforated metal that is inside the exhaust makes the fit too tight. Any suggestions?
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Old 01-15-2013, 01:20 PM   #11
DeleriousZ
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2000 ST-outback
White/Grey

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Hit it with a hammer.
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