Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

New SPT cat back system

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Old Sep 21, 2003 | 08:41 PM
  #2  
Mach5WRX's Avatar
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PICTURES!!!!!!!
Old Sep 23, 2003 | 07:30 PM
  #4  
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spt exhaust is made by bosal.

jay
Old Sep 25, 2003 | 10:55 PM
  #5  
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$428.57
This is a brand new cat-back system directly from Subaru! System includes a mid-pipe, performance muffler, and hardware. This system features 3" diameter piping which will enhance your vehicle performance and syle. Tip is etched with a the sporty look of SPT! The System looks, and Sounds Great!
Supply is NOW avalible, order yours today!


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Old Sep 27, 2003 | 10:22 AM
  #6  
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Irvine Subaru is selling these for 359.96 plus shipping. Search for the Bosal single tip catback for more pics. It does not have a resonator, but the muffler is baffled to keep noise down.

jay
Old Sep 27, 2003 | 07:35 PM
  #7  
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Originally posted by illmatic
the muffler is baffled to keep noise down.

Which means its just a multi-chamber muffler like stock, not a straight through design, that sucks
Old Oct 5, 2003 | 08:01 AM
  #9  
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Car Info: 19' Impreza Sport Manual / 99 Miata / 13' OB
I have the Cobb system on my XT, straight through design, and they only claim ~5 hp and ~8 Ft lbs of touque. Sounds similar to the SPT one. No resonator/ 3" pipe.
Old Oct 11, 2003 | 08:44 AM
  #10  
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Thats a nice looking exhaust... Give us pictures when you have it installed!
Old Oct 11, 2003 | 05:49 PM
  #11  
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i would say the gains posted by peaty are pretty accurate, if not a bit on the low side.

the thing with exhausts on turbo cars is that you want as little backpressure as possible because backpressure doesn't even help torque like it would in a NA motor. so by getting a straight through muffler, you really are freeing up a good amount of power AND torque. on a WRX, the difference is definitely noticable, and due to the fact that the STi is even more powerful to begin with, i would imagine that the gains to be had with a straight through muffler would be even greater. another thing to think about is, why would you want another baffled muffler when the STi already comes with a decent performing baffled muffler in the first place? the added size of pipe would be the only benefit as far as i can see. and you can get straight through mufflers that are actually decently quiet these days, so IMHO, they would be a better bet.

tim
Old Oct 12, 2003 | 09:30 AM
  #13  
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Car Info: 19' Impreza Sport Manual / 99 Miata / 13' OB
From here:

http://www.subaruforester.com/forum/viewtopic.php?t=645

The SPT system removes the resonator too:



Here is the midpipe from my XT which is the same as the STi, at least when I looked under my friends it looks the same.

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