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Old 02-02-2006, 08:44 PM   #1
Rippen Griffen
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Location: Chesterfield, VA
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AD Motorsports FTW
06 OBP - Cobb AP Stg 2

Question Stock exhaust w/ Cut-out?

Has anyone developed a cated downpipe that has a cut-out before the cat? I would be very interested in this...

My plan would be:
1. keep the quite stock exhaust sound
2. add cut-out and accessPORT
3. be able to switch between stock mode and wide-open stage 2

Here what it would look like:

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Old 02-02-2006, 08:55 PM   #2
kinada423
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Someone has allready developed one that electronically controlled and you can purchase it as a cutout our use their specially made downpipe.

Check it out here.

Haven't heard any info on how good it works from anyone though...watch the videos. It's loud as hell.
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Old 02-02-2006, 09:02 PM   #3
Rippen Griffen
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Thanks for the info!

The video on the site has a WRX with a loud, high flow exhaust and then the QTP opens and it's only a little louder. If a wrx already had a high flow exhaust I wouldn't expect muct of a difference in HP between open and closed on the cut-out. But, if the car ran a stock exhaust and switched over, plus had the accessPORT....BAM! Huge difference!!
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Old 02-02-2006, 09:49 PM   #4
InfamousDX
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I have one... i love it. Buy a dp you want... buy their SS y pipe + cutout and have a shop weld it.. simple.
http://infamousdx.com/wrx/infamous_qtec.wmv
http://infamousdx.com/wrx/infamousdx_qtec.wmv

For completely stock exhaust, I don't know about the tune, whether AFR's would stay the same. for what I had (downpipe + cutout and stock everything else), AFR's stayed the same open and clsoed, which is what you would want.
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Old 02-03-2006, 07:59 AM   #5
Rippen Griffen
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Nice videos InfamousDX! Is your exhaust quite when the QTP is closed? I travel up and down I-95 alot and hate the loud droning noise from a loud exhaust. But, at the same time it sure is nice to hear when zippen around town.
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Old 02-03-2006, 09:46 AM   #6
InfamousDX
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It's a little louder because of the afermarket downpipe but that comes with any dp. When it's closed, it sounds like my car just has a DP... when open... wow.
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