Stromung cat back Group Purchase

[projectJTv4]

Sorry for the delayed response, I was able to get in contact with Scott on the 4th, but was out of town until earlier this week. Very knowledgeable and nice guy to chat with. He mentioned that the lower muffler brackets are not needed because of the 4 tabs that are welded on to the muffler itself, which makes sense. But I've seen numerous pictures with them installed.

that's good to know!

Also, that exhaust hanger bit looks like it's bent or something? Damaged in shipping? That aint right for sure.

I’d have to agree, it looks like it got bent in shipping. I’m curious how they will resolve it, or if they will have you bend it back yourself and knock some $$$ off the price. Has anyone else received theirs to confirm if they too have the same issue? Mine hasn’t shipped yet, but Scott mentioned mine would go out a week later.

Scott saw the pictures and said it was the worst bend he's ever seen, despite the extra padding and protection they added. What's odd is that there's no damage to the box at all.

He also suggested simply bending it back as well to align with the upper muffler bracket, which I did.

Here’s a video https://youtu.be/9-WPQErpA5g

I noticed that your tips are lower on the driver's side more, did you leave it alone or fix that after the video?

My tips are also lower on the left side and the muffler is biased more towards the passenger side. Did you leave this alone or fix it after the video?









I tried to move the muffler more towards the driver's side, but it looks like its constrained by the front muffler hanger (new OEM), which you can see is pretty stretched out here.

[shoppingshzhang]

Hi Stan , I am in for one too if they become available. Located in the SF bay area and I have an 88 325ic. Thanks!

[bc419]

From time to time buyers will change their mind after they purchase. You might post that here. What car do you have? Where are you located?

Thanks for the tip!

If anyone has a dual tip, resonated, dual wall exhaust they are selling, let me know.

I have an '84 323i. The project is an m20 2.7 build (using the stock 731 head). At some point I'll need an exhaust so I'm putting it out there if someone has one they're selling.

Also, I'm in the Chicagoland area if there happens to be someone local. Thanks!

[Stan]

Stan Hi Stan, I know I missed this past April's group buy. Do you know if there any "unclaimed" exhausts?

Thanks,
Brian

From time to time buyers will change their mind after they purchase. You might post that here. What car do you have? Where are you located?

[bc419]

Stan Hi Stan, I know I missed this past April's group buy. Do you know if there any "unclaimed" exhausts?

Thanks,
Brian

[TKuhl]

I wish I knew! I’m waiting on a fuel pump, first one arrived and was DOA. With current scarcity and delays and shipping delays, been over a month trying to get the car to run again. And with the pump finally arriving and then being dead, not sure when I’ll be able to hear it run.

It was a nice “win” yesterday though, installing this exhaust went really easy and straight forward.

[Stan]

Was late to the order but made it in time. Just got delivered on Thursday and installed today. Took about 2 hours total, I just cut old out bolts pipe rubber mounts and all. The new one went in real easy. I bought all new rubber mounts and muffler mounts. Everything fit great, my tailpipe is 1/2 “ off center so I’ll have to bend the straps a bit to get it to center. BTW don’t need the bottom straps, I should have looked closer oh well.

One question, how tight are you tightening the spring/bolts to the cat? I’ve got about 3/4” threads showing, spring not bottomed out, pretty snug but I didn’t muscle them too hard

tried to add a couple pics but file size too big from my phones camera (I’m technically deficient)

Any droning at low RPM/

[TKuhl]

Was late to the order but made it in time. Just got delivered on Thursday and installed today. Took about 2 hours total, I just cut old out bolts pipe rubber mounts and all. The new one went in real easy. I bought all new rubber mounts and muffler mounts. Everything fit great, my tailpipe is 1/2 “ off center so I’ll have to bend the straps a bit to get it to center. BTW don’t need the bottom straps, I should have looked closer oh well.

One question, how tight are you tightening the spring/bolts to the cat? I’ve got about 3/4” threads showing, spring not bottomed out, pretty snug but I didn’t muscle them too hard

tried to add a couple pics but file size too big from my phones camera (I’m technically deficient)

[808ETA]

I finally received my Stromung exhaust from the previous group buy and it has the wrong tips. Does anyone know if there is a big sound difference between the resonated and non-resonated tips? I was thinking the exhaust tips would only be cosmetic and I was ready to live with that but I think the sound is going to be different too.

[agarcia]

You just have to determine which Mtech 2 Rear bumper you have. Apparently there are two versions, one with exhaust cutouts for slanted tips and one for straight tips. Which exhaust did you end up buying? The more common version is for slanted tips.

I ended up purchasing the straight tips exhaust for a non mtech bumper last year from Scott. As for the type of mtech rear bumper, its being shipped from overseas so ill just have to wait and find out then if i will purchase a stromung mtech specific exhaust or see if i can modify this current one. I believe the mtech stromung exhaust is also a bit longer correct?

[Mike36]

Any ideas on modifying my current stromung exhaust to fit an mtech 2 rear bumper aside from cutting the rear bumper? Couldn't pass up the mtech kit I found and just recently installed the 325i exhaust. Kit is currently getting painted. Also i like the way the double wall perforated tips look and I think the mtech option Scott offers is not perforated?

You just have to determine which Mtech 2 Rear bumper you have. Apparently there are two versions, one with exhaust cutouts for slanted tips and one for straight tips. Which exhaust did you end up buying? The more common version is for slanted tips.

[Stan]

Installed in my son's 325i cabrio. Drones at low RPM but fine at idle and higher RPM
Straight dual perforated.

[agarcia]

how does it sound? Any droning at low RPM?

The droning is actually pretty noticeable between 2200-2500 rpms. I get some vibrations in the cabin and it can get a bit annoying at times if i pay attention to it. At first I thought it wasn't tightened correctly since I have an aftermarket cat and one side seemed to not sit flush, so i had it welded hoping that was the case. It got a tad quieter but still around the same rpms ill hear the droning. Other than the droning, its exactly what i was looking for. Sounds nice on the highway and I like the idle.

Since you mentioned the droning, do you have the same style? would the non perforated version sound a bit better at lower rpms?

[Toowav]

Here’s a video https://youtu.be/9-WPQErpA5g

[Stan]

Any ideas on modifying my current stromung exhaust to fit an mtech 2 rear bumper aside from cutting the rear bumper? Couldn't pass up the mtech kit I found and just recently installed the 325i exhaust. Kit is currently getting painted. Also i like the way the double wall perforated tips look and I think the mtech option Scott offers is not perforated?

how does it sound? Any droning at low RPM?