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Old 04-22-2002, 07:32 PM   #1
Canadian 2.5RS
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Question will this exhaust work for my RS?

Quote:
===BPM GT Catback. Fully stainless. BPM Muffler polished. New design 3" midpipe made by Brullen to fit the downpipe correctly (the BPM midpipe did not fit properly, so I had this one made instead).
i can get a pretty good deal on it so i was wondering if 3" is too big? ive heard rumors that i will lose low end torque, is this true? i dont plan on turboing my car for awhile yet, so i dont know if a turbo cat back will work for me.
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Old 04-22-2002, 07:40 PM   #2
GTBGUY
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Canadian 2.5RS - 3 issues here:
(1) 3" is ment for those going turbo
(2) will not mate up to the stock cats
(3) you will loose lots of low-end.
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Old 04-22-2002, 08:07 PM   #3
Canadian 2.5RS
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GTBGUY: what do you mean when you say it wont "mate up" with stock cats? he says that he had a brullen midpipe made so it will fit corretly.

I know 3" is meant for those going turbo, but i will be going turbo sooner or later, what i want to know is will it work for the time being?

Sorry if im doubting your info but i believe you to be a little bias since you sell the brullen setup (so ive been told that is).

does anyone have personal experiences with this setup on a non turbo?
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Old 04-22-2002, 08:33 PM   #4
dsj
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GTBGUY is right.

While I haven't tried it, 3" is way too big for the 2.5 NA IMHO. The general consensus is that with a 2.5" exhaust you will lose some low end - a 3" would lose that much more. Also, from your post it sound like that exhaust was custom made for a turbo ("to fit the downpipe"). I also agree that the pipe will not mate to the stock cat.
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Old 04-22-2002, 10:52 PM   #5
iON Performance Inc
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Canadian 2.5RS - simply put it, the 3" mid-pipe's flange is too large for the stock catylitic converter. It will physically fit in the location, however you will see about 0.5" gap between the largest part of the donut gasket and the inside of the flange on the mid-pipe.

As for the bias, wouldn't you think someone who deals exclusively with Brullen only would know whether or not it'd fit, as it was a "custom Brullen" mid-pipe. However, again, it was made to fit the down-pipe to the WRX, and not the OE cat converters in the RS.
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Old 04-23-2002, 12:00 AM   #6
Canadian 2.5RS
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The guy that is selling it has a 01 RS and had the pipe made to fit the RS since the BMP wouldn't. ill se if i can get him to participate in this discussion since he know more about it than i do.

im not trying to be hostile in any way. im just trying to get all the info i can before making a purchase such as this.i am not even decided on which cat back i am going to buy yet.right now im just collecting information.

iON Performance Inc: ive been told that the brullen system is rather heavy, is there any truth to this statement? can you get me an average weight on the entire cat back?
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Old 04-23-2002, 06:55 PM   #7
Canadian 2.5RS
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This is what the seller emailed me

"The end of the midpipe that mates up with the cat is flared down to 2.5". It should fit. You might need a new flange donut, or a new flange welded on as the worst-case. Both are easily done by an exhaust shop."
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Old 04-23-2002, 07:39 PM   #8
iON Performance Inc
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Canadian 2.5RS - the BPM was originally for a '02-up WRX, and hence the normal mid-pipe would not physically fit the '01RS.
However, your cat-flange will need to be modified to work with this unit, if it is infact is 2.5" where it's flared. Not many places in Alberta have the correct wire for TIG/MIG to do stainless, so be forwarned.

As for the weight of the system, this totally depends on configuration. Shipping weight can range anywhere from 29lbs for a 2.25" single tip w/ loud acoustics to 36lbs for the dual tip w/ quiet acoustics. Also it's 16 gauge stainless steel, so it's beefy, and hence the reason why there's a lifetime warranty offered on them. Weight is a function of gauge of stainless steel, flanges, muffler style, acoustic preference etc.

Many Japanese systems (which are the lightest ones) use anywhere between 20-24 gauge stainless which is pretty thin.

Shedding weight from your rotational mass ie: tires/wheels or stereo equipment would be more beneficial than having a 5-10lb heavier exhast system which is spread fairly evenly throughout the centreline of the vehicle.
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Old 04-23-2002, 08:17 PM   #9
jeff22
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Are you looking for a 2.5" exhaust? I am looking for a 3" exhaust. I have a rallispec all stainless 2.5" with resignator. sounds gooood, I don't really want to give it up but the
3" exhaust is now needed for the turbo!
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Old 04-24-2002, 01:58 AM   #10
Keenan
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Cdn 2.5 - here are my thoughts, take em or leave em.

Your original question was whether this would work or not. Well, if the current owner has a 2.5RS and it fits on his, there is no reason it will not fit on yours. Obviously he has been running it and his car hasn't died, stalled, CEL'd or some other lame thing that people reckon a catback exhaust can do to your car. So, will it work? Yes.

Will you lose low end? Possibly. People often state that they lose low end when they add an exhaust because there is no back pressure. I have yet to have someone tell me that they have measured that loss of low end torque by anything other than their butt-dyno. This is not to say it won't but I believe the effect is grossly exaggerated in most cases. When I went to 2.25", I did not notice any real difference in low end. In fact, I would be tempted to say that it only made a difference on my top end acceleration. I believe my intake was the #1 upgrade to my car so far.

As for a Brullen midpipe being modified to fit the exhaust, I see no reason why it couldn't have been. Granted GTBGUY may be the 'exclusive' distributor of Brullen products for Subaru's but that is not to say it has not or cannot be done without his knowledge.

As for not many places having the proper wire in Alberta, I think that is crap. Sorry GTBGUY, just my opinion. Guyon in Calgary fabricates stainless steel headers. I am sure there are many other places out there, that may not be muffler shops that could do it also. Its not like Alberta fabricators never work with stainless steel in applications. Granted it is more rare than your average welder, but by no means would I say as rare as your post seems to imply.

If you plan to go turbo in the future, you anticipate that this catback will suit your needs, you feel the price is right and you are not concerned if you do lose a bit of low end torque (assuming it would) then I say buy it.

Keenan
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Old 04-24-2002, 01:05 PM   #11
iON Performance Inc
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Keenan - how are you doing? thanks for chiming in. From what I understand the system is brand new and hasn't been used yet.

As for the Guyon your right, however Cdn2.5 is located in Red Deer. It's not as common as mild steel or aluminized and hence not many places.
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