Stromung cat back Group Purchase
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Did Scott say if their quiet version would still be a little louder than stock 325i/s catback? That is what I want, just a little more volume than stock. -
Update: Spoke with Scott at Stromung.
1. He will send pictures of the tips he can offer
2. He will present a discounted price
3. He recommends the standard muffler for those of you NOT driving a convertible as feedback from customers states they would not want it quieter.
4. Please update this informational list with QUIET or STANDARD muffler.
Thanks guys.
We are getting close now!!!👍 1Leave a comment:
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I should probably be an quasi respectable individual and have a muffler....Leave a comment:
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got you.
1. Zzyzx85 - 325i
2. OldDogNewE30 - 325i “Cabi” dual wall tips
3. hotbascosauce - 318is
4. KyleHugo -325i - straight tip
5. TC Baur MD - 325i
6. AmosCake - 318is
7. Alberthype - 325i angled double walled
8. siggy - 325i "quieter"
9. afterafx - 325i - pending pricing info
10. 88Sedan - pending pricing info
11. jrobie79 - pending muffler only
12. RyansE30 - Mtech2 fitment? single wall angled/mitered cut tips
13. Kyle90 - 318is - MTech 2 fitment?
14. hank6711 - 325i angled double walled
15. E30-TourZing - 325i straight double walled
16. calvino - 325i angled double walled for MTech 1
17. sjmorris1 - 325i slanted - perforated tips - dual wallLast edited by Zzyzx85; 02-23-2026, 04:33 PM.Leave a comment:
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Is it too late to jump in on this? If not then slanted - perforated tips - dual wall - for '90 325isLeave a comment:
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I'm in, already on the list! 325is, Mtech2 fitment? single wall angled/mitered cut tipsLeave a comment:
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got it
dual walled?
2/19 updated list:
1. Zzyzx85 - 325i
2. OldDogNewE30 - 325i “Cabi” dual wall tips
3. hotbascosauce - 318is
4. KyleHugo -325i - straight tip - no muffler/pipes only?
5. TC Baur MD - 325i
6. AmosCake - 318is
7. Alberthype - 325i angled double walled
8. siggy - 325i "quieter"
9. afterafx - 325i - pending pricing info
10. 88Sedan - pending pricing info
11. jrobie79 - pending muffler only
12. RyansE30 - Mtech2 fitment? single wall angled/mitered cut tips
13. Kyle90 - 318is - MTech 2 fitment?
14. hank6711 - 325i angled double walled
15. E30-TourZing - 325i straight double walled
16. calvino - 325i angled double walled for MTech 1Last edited by Zzyzx85; 02-20-2026, 08:35 AM.Leave a comment:
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Can I update mine to straight tips as well? Also dare I ask of it's available without a muffler?Leave a comment:
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Please add me to the list, 325i angled double wall tips for a MTech 1Leave a comment:
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1. Zzyzx85 - 325i
2. OldDogNewE30 - 325i “Cabi” dual wall tips
3. hotbascosauce - 318is
4. KyleHugo -325i
5. TC Baur MD - 325i
6. AmosCake - 318is
7. Alberthype - 325i angled double walled
8. siggy - 325i "quieter"
9. afterafx - 325i - pending pricing info
10. 88Sedan - pending pricing info
11. jrobie79 - pending muffler only
12. RyansE30
13. Kyle90 - 318is - MTech2 fitment?
14. hank6711 - 325i angled double walled
15. E30-TourZing - 325i straight double walledLast edited by Zzyzx85; 02-15-2026, 01:56 PM.Leave a comment:
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Please add me to the list as well. - Cat back - 325i Straight tips w/ Double WallingLeave a comment:
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typically once he gets the raw materials, it is pretty quick. The supplier of the pipes went through a change of ownership and once fully resolved the production should be soon. Also, he need t confirm pricing on his new stock before committing to a selling price. It will be discounted due to volume. Frankly he is amazed at the attention! They thought E30 interest was done so they tossed the jig and needed to make a new one after we started the group buys!Leave a comment:
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Can I get added to this list? 325i angled double walled If available, If not, then whatever they'll offer for the group works for me.Leave a comment:

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