Stromung Midpipe?

[rudgers73]

Hey everyone,

I am trying to decide whether I should go for a Stromung Midpipe on my 99 LGT. I currently have a borla header and S/S Stromung Axelback. I like the tone of the muffler and the borla gives it a nice howl at about 6k RPM. Does anyone have any experience with adding a stromung midpipe to a similar setup... or to any setup for the sake of me getting some info/feedback?

Thanks in advance.

[Huffer]

For the price, get a custom one made up. Same deal, less $$$.

[2.5GT]

I got mine made and installed for $70 at a local muffler shop :wink:

[99SUS SFD]

I paid out the ass for my Stromung. But then again, I don't have any worthy shops in the area that could attempt custom work.

[rudgers73]

What kind of difference does it give you? Sound/Torque, etc.

[99SUS SFD]

When I installed mine, I already had my SPT axel back installed. Honestly I didn't notice any difference at all with just the mid pipe and the axel back. I was actually disappointed, haha. Installing the hi flow cat was what made difference for me. I think when all components get together it makes for a good situation.

[Reason]

One problem is you have the SPT muffler, you wont get much sound out of that. You should notice a little more since you have a Stromung axle back. 99SUS was bottle necking and that just effs up exhaust flow. For what anyone tells you that Stromung mid pipe is nicer than any Joe at a muffler shop can make for the money. I'll spend a little more on a product for quality and presentation than a mediocre welded pipe guess bent and usually too long or too short of a pipe.

[dplacencia]

I just love my exhaust set up. Best sound I have heard out of any of my cars.

Borla headers
Stromung high flow cat
Stromung mid pipe
Stromung axel back

[99SUS SFD]

I got the SPT for a couple of reasons. One being that it wasn't too expensive and the other being that it wasn't that loud. I wanted something a bit nicer than the stock exhaust without being too loud.

Do you think I'm still bottle necking?

Not trying to thread-jack here. Rudgers, have you thought of getting the Stromung high flow cat as well?

[Huffer]

Meh - if you can get a mandrel bent T304 stainless pipe bent (and there's very little bends to be honest) for under $100 then I'll rock that any day over a $169 Stromung.
Oh wait, I already did. :lol:

It's a flanged pipe. Let's not overthink it. :smt023

[Reason]

Meh - if you can get a mandrel bent T304 stainless pipe bent (and there's very little bends to be honest) for under $100 then I'll rock that any day over a $169 Stromung.
Oh wait, I already did. :lol:

It's a flanged pipe. Let's not overthink it. :smt023

Pics please

[Huffer]

Sorry, none available at this time. It's been installed for 2 years. I "check-book-racered" the install with the 05 STi axleback. :lol:

[Reason]

Stromung buddy :smt023

[dplacencia]

Yeah Stromung baby!!!! :smt023 :smt023

[rougeben83]

lol $400 piece of bent pipe. :wink:

ok, I'll contribute something constructive with the dyno chart comparison someone else had done.

https://sl-i.net/FORUM/images/imported/2009/04/3275397309_cfe56ee904_opng-1.jpg
http://forums.nasioc.com/forums/showthr ... ?t=1698802 (http://forums.nasioc.com/forums/showthread.php?t=1698802)

[rudgers73]

dplacencia: I have wanted the same setup as you have for a while now, I am just a little apprehensive towards the installation of a high-flow cat. I don't wanna have to mess with any CELs. I have asked several peoples' opinions of installing a high flow cat and O2 sensor feedback, etc and I have always gotten mixed replies. I don't know if any of you guys live in the state of NY, but the inspection/emissions test is pretty strict. I know there are several things that can be done if a certain mod causes CELs including messing with the computer, or moving the O2 sensor location, but I would rather not fight with my car for a bolt-on part.

Can anyone convince me that there won't be any issues if I install a stromung high-flow cat? I know that a high-flow cat would be one of the best things to add at this point as far as value. Plus I hear it makes the car sound more like a WRX.

Thanks for all the quick feedback guys.

[Huffer]

You will ALWAYS get mixed replies. Some cars don't need a spacer for the rear O2. Some do. You won't know until you install it, but having the rear spacer on the O2 isn't going to hurt and it only costs about $25 (or $10 if you DIY it).

[HeresMyMind]

I just love my exhaust set up. Best sound I have heard out of any of my cars.

Borla headers
Stromung high flow cat
Stromung mid pipe
Stromung axel back

that is exactly what I have, which is deff by far the best set up. I have a TINY bit of rasp at high rpms, so a basic resonator in the midpipe will stop that

-B

[rougeben83]

dplacencia: I have wanted the same setup as you have for a while now, I am just a little apprehensive towards the installation of a high-flow cat. I don't wanna have to mess with any CELs. I have asked several peoples' opinions of installing a high flow cat and O2 sensor feedback, etc and I have always gotten mixed replies. I don't know if any of you guys live in the state of NY, but the inspection/emissions test is pretty strict. I know there are several things that can be done if a certain mod causes CELs including messing with the computer, or moving the O2 sensor location, but I would rather not fight with my car for a bolt-on part.

Can anyone convince me that there won't be any issues if I install a stromung high-flow cat? I know that a high-flow cat would be one of the best things to add at this point as far as value. Plus I hear it makes the car sound more like a WRX.

Thanks for all the quick feedback guys.

please clear this up, 1st post says you have a borla uel, and an axleback. You want a midpipe? That goes from the cat to the axleback. You can leave the cat section alone with that. Or do you want the cat section replaced as well?

The former is fine, I passed 2 NYS inspections with a full catback and 2 different types of headers, the cat section I left alone because 1) I didn't want to get hassled with emissions and 2) as I stated, you don't gain ANY performance from a hi-flow unit unless you've already put in cams and headwork in your car, it's just another noise maker.

YMMV with a hi flow cat section as some people have needed no spacer, 1 spacer, 2 spacers to clear the CEL, or they could never get the CEL cleared short of doing the electronic fix that you solder into your o2 sensor.

[rudgers73]

I want a midpipe. I wasn't considering a high-flow cat until I saw that dplacencia had one on his car and I could actually ask someone first hand about it.

I am more concerned about performance than noise. Which one would give me more power (if either)?

Thanks

[rougeben83]

I want a midpipe. I wasn't considering a high-flow cat until I saw that dplacencia had one on his car and I could actually ask someone first hand about it.

I am more concerned about performance than noise. Which one would give me more power (if either)?

Thanks

look at the dyno graph I posted and read the NASIOC link below it. Thats a couple of baseline runs, a couple of hi-flo cat runs, and a couple of track pipe (ie no cats at all) runs, on the same car on the same dyno. Do you see any performance gain?

I'd just get a midpipe and call it a day. But it's your money, so if you want to go all the way then by all means.

[rudgers73]

rougeben83:

Thanks for the info. Maybe exhaust isn't the path I should take at this point. Here is my dilemma, maybe you can help:

I am addicted to changing things on my car to make it perform better, but I am reaching the point where I don't want to do anything major. This is for two reasons. 1) My Legacy is 10 years old. 2) My Legacy has 110k miles on it.

I have a lot of fun at autocross in the summer and it is fun to see improvements as I change parts and tires, but my car's actual value is pressing against the make-it-faster factor because after something major craps out, I'm just going to get something different (prolly a newer subie), and we all know that a bunch of bolt-on parts to a 10 yr old car that isn't "track" is prolly going to degrade the saleability if anything.

So, Ben, what do you think I should do next that will give me the most bang for my buck?

P.S. I think I am beyond the point of wanting to crack open my engine. Maybe stage 5 weight reduction: taking off my doors, trunk lid, and ripping out the carpet? lol

Thanks

[dplacencia]

I have not had a problem with my high flow cat. No cells at all for the cat.

The other thing is I have a 97 and I know it's not a newer car and all. I still enjoy modding it and I do it for me not anyone else.

[rudgers73]

dplacencia,

Cool to hear that you haven't had any CEL issues. I will def take note of that.

What was your favorite/best mod so far? I am starting to lean toward a lightweight and/or undersized crank pulley. It would be nice to have a snappier start. Sometimes it feels like I have no torque until I get up to mid range RPMs. Then again, there is another risk with CELs in doing that as well.

Let me hear some feedback.

[rougeben83]

dplacencia,

Cool to hear that you haven't had any CEL issues. I will def take note of that.

What was your favorite/best mod so far? I am starting to lean toward a lightweight and/or undersized crank pulley. It would be nice to have a snappier start. Sometimes it feels like I have no torque until I get up to mid range RPMs. Then again, there is another risk with CELs in doing that as well.

Let me hear some feedback.

with you autoxing, you should be focusing on tires, suspension, and brakes. Modding an NA subaru, while fun, tends to have a glass ceiling that you can't break without spending money that is greatly disproportionate to the actual performance gain.