Stromung cat back Group Purchase

[Mahalaleel]

By the time this gets organized I may be ready for a stromung for the 325i (future swapped s50)

[Bnardog]

Not sure if anyone's going to organize another group buy but i'm interested! Also, Stan, I'm interested in the used stromung if it can fit an mtech1 valance. I think it should be angle cut?

[Stan]

Not sure if anyone's going to organize another group buy but i'm interested! Also, Stan, I'm interested in the used stromung if it can fit an mtech1 valance. I think it should be angle cut?

No used Stromung at this time.

[Maybe Magpie]

Belatedly but I got one of these in the 2021 group buy period - with the autotragic I used to have it was kind of droney at a lot of typical street and highway RPMs, but with the 5-speed swap done it's much, MUCH more enjoyable overall, and sounds great when you get your foot on it. It's a smidge loud at idle outside the car for my tastes because I don't like annoying my neighbors when warming her up or coming home late, but I have a more low-key preference in that regard than most so I imagine for most people on r3v it's in a great sweet spot. If you can get your mitts on one, they're a nice upgrade if your old one is on the way out like mine was. I can't say I've noticed any power gain in the butt dyno in the time I've had it - I recall reading it allegedly gets you like 5-10hp-ish - but that wasn't really my goal with it and I'm sure somebody with a hopped up motor that isn't stock like mine would get something out of it.

Good luck with the next round if it happens! I'm content with mine.

[AmosCake]

Are there 10 people ready for a group buy now? Interested in joining

[Stan]

Are there 10 people ready for a group buy now? Interested in joining

you are #2

[ItsCoop]

I’m new here, but interested as well!

[calvino]

Also interested in joining, slash cut dual wall 325is for mtech 1

[McGyver]

Belatedly but I got one of these in the 2021 group buy period - with the autotragic I used to have it was kind of droney at a lot of typical street and highway RPMs, but with the 5-speed swap done it's much, MUCH more enjoyable overall, and sounds great when you get your foot on it. It's a smidge loud at idle outside the car for my tastes because I don't like annoying my neighbors when warming her up or coming home late, but I have a more low-key preference in that regard than most so I imagine for most people on r3v it's in a great sweet spot. If you can get your mitts on one, they're a nice upgrade if your old one is on the way out like mine was. I can't say I've noticed any power gain in the butt dyno in the time I've had it - I recall reading it allegedly gets you like 5-10hp-ish - but that wasn't really my goal with it and I'm sure somebody with a hopped up motor that isn't stock like mine would get something out of it.

Good luck with the next round if it happens! I'm content with mine.

I'll echo this. I was part of a 2023 or 2024 group buy and just got around to installing it on my sedan with a stock engine and cat. The car is automatic.

It sounds great at idle and reving it up while sitting still. A little louder than I expected, but a really good deep tone and no rasp. I was a little disappointed on the first drive because it's just sort of loud and droney. That being said, it was 98 and humid out, so I was sweating buckets and was generally in a pissy mood. I was also taking used oil to recycle, so I was driving super carefully and the RPMs weren't changing much. I got on it a few times once the oil was gone and it sounded really good at WOT with changes in RPM. But if I'm just driving around the city at low speeds, or cruising on the highway, the drone might get to me.

I'll rock it for a while to see if it grows on me. If not, I'll go back to my rusted stock exhaust until the car is manual swapped. I'm sure the constant RPM changes with a manual will sound better.

The car will be turbo'd in the next year or so, so this setup will be too restrictive. Scott said he can do a muffler with a single 3" inlet and a v-band. Perhaps I'll see if that counts for a group buy discount when I'm ready.


*******EDIT********
I realized that I had a massive exhaust leak coming from the driver's side connection to the cat. The passenger side uses a metal doughnut inside the connection. The driver's side uses a crushable doughnut around the connection. I've never had to replace the driver's side one before, so I didn't think about it. Now that it's on correctly, most of the drone is gone. It's way quieter putzing around town. It still has a deep tone and sounds a little louder than a rusted out stock muffler. WOT has a really great tone. I would definitely suggest this on an auto and expect it to sound even better on a manual car.

[hotbascosauce]

Hope there is another group buy. I would love one of these exhausts for my 318is.

[Stan]

Working on it

[BadDays]

Hopefully one is opened up soon, I'm interested in joining this group buy since I'm looking for a exhaust for my 318i!

[Gregolas]

Would also be game!

[Gaarath378]

Id be down!

[Stan]

I spoke with Scott @ Stromung. They are in their busy season and haven't had time to do the design work. Sometime in Mid-September, things quiet down and he will spend the time to create the system we want.