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Old 06-08-2004, 07:23 PM   #1
notawrx
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Impreza GC8 FAT Downpipe - doesn't meet up to stock RS midpipe

I just put a used FAT stage 2 turbo kit on my 99 RS, with the catless downpipe. To my dismay, the downpipe is about 9 inches too long to meet up with the RS midpipe. (edit: i mean location - obviously the stock pipe is too small)

So, all of my searches indicate nothing of downpipe to midpipe mismatches between wrx/rs/gc8 exhausts - only between midpipe and axleback.

Is the axleback flange about 9 inches shorter (further back) on a WRX?

I am about to go with the WRX 3 inch Stromung Dual tip, and a custom fabricated midpipe, unless i find out there is an easier solution out there to this unfortunate situation.

any advice would be appreciated.

Jason
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Last edited by notawrx; 06-08-2004 at 09:08 PM.
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Old 06-08-2004, 07:31 PM   #2
White 2.5rs
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I am about to go with the WRX 3 inch Stromung Dual tip, and a custom fabricated midpipe, unless i find out there is an easier solution out there to this unfortunate situation.

might as well do that
and if ur output of the DP is 2.5 have a slight taper
it shouldnt take more than an hour and should look pretty slick
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Old 06-08-2004, 07:41 PM   #3
notawrx
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This downpipe goes from 2.5 to 3 inch about halfway... not sure why, but hopefully the rest will be 3 inch all the way back once i get it together....

I have the RS 2.25 Stromung right now, but I'm sure that is too small, so I'll just sell it or something. I have always liked the dual tip

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Old 06-08-2004, 07:49 PM   #4
White 2.5rs
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i had the stromung 2.25" it didnt have too bad of a sound
but yeah man just is it a straight section of pipe? or bent?
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Old 06-08-2004, 08:35 PM   #5
notawrx
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there would be a couple bends in it... hopefully it wont be a big deal. if they cant do mandrel bends or weld pieces together, the 3 inch pipe should till be sufficient
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Old 06-08-2004, 08:50 PM   #6
kastle
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The FAT kits are not designed to work with the stock 1 7/8" exhaust system....
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Old 06-08-2004, 09:05 PM   #7
notawrx
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They are appearently only designed to match up to FAT exhaust systems, or custom.
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Old 06-08-2004, 10:34 PM   #8
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The FAT kits are not meant to mate up to a stock exhaust, and you'll need to modify most aftermarket exhausts.

I asked Robert about this, and he says that it forces you to NOT use the stock exhaust. He absolutely does not anyone to use stock, and he recommends 2.5" or larger. You have to alter your midpipe.
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Old 06-08-2004, 10:51 PM   #9
notawrx
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That is fine with me, i just wanted to see if there was an easier option. right now i have a chopped off 2.25 midpipe which is inserted 2 inches into into the 3" pipe, wrapped in fiberglass to fill the gap, and taped up with foil tape... there isn't much debate that this is not a permanent solution, but MacGuyver would be proud
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Old 06-09-2004, 12:02 PM   #10
Aphex
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notawrx.... if you like the dual tip and want 3" why not go with the borla hush system for the wrx. I have one on my car, and is indeed shorter than the stock RS stuff, I need to have my pipe lengthened, not sure how much right now, need to go measure it, but beyond that, it's 3" and looks absolutely fantastic on the old school bodystyle. Brad at Titan Motorsports (www.subarustore.com) is where I got mine from, great vendor. and now the proof in the pudding.





and as you can tell by my license plate.... I like your nasioc handle

I'll update this as soon as I measure the gap of the exhaust.
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Old 06-09-2004, 01:11 PM   #11
notawrx
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That looks nice. maybe a little more restrictive than the Stromung, but might not hurt on a 3inch system. Do you have the silenced midpipe too? I like the idea of something a little quieter. do you happen to have the FAT turbo downpipe? I might buy this whole exhaust and adjust it to meet the downpipe.

BTW - my ohio plate says the same thing

Last edited by notawrx; 06-09-2004 at 01:17 PM.
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Old 06-09-2004, 02:28 PM   #12
Aphex
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ok, I just went out and got some measurements. the borla uses slip joints, and there is a resonator in my midpipe. the front most slip joint has a 3" to 2.5" reducer and a slip flange to work with the stock donut. this is the part that needs to be modified. I have a ludespeed downpipe and it ends at the stock location.



it's hanging down a lot since it isn't bolted up, once it's bolted up it will be real snug against the bottom of the car.

here is the front most flange.



and how it looks with the stock exhaust location



measuring from the very front of the pipe to the downpipe I got 2.25"

so if the FAT downpipe really is ~8" longer, then you probably won't even need that piece and can get the midpipe cut short and put a flange on it to mate to the FAT downpipe.

hope this helps.
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Old 06-09-2004, 04:20 PM   #13
notawrx
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Thanks for your help. I think it will work well.

One of these days I need to get a digital camera so I can reply as quickly as this!

BTW, my car is rally blue, but if I have the same license plate and exhaust, you'll have a twin in Ohio. I'll post a pic when i get home and can scan it in
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