Sounds really good. Just out of curiosity, did you consider the other oem exhaust mod (4 perforated pipes)? I'm torn between the two and would really like your opinion.
I think the ACM sound is what I want 70% of the time, but scared it's too loud the 30%. How is it with windows up?
Thanks for the most comprehensive review yet btw
2008 E92 M3: Sparkling Graphite | Bamboo Beige | 6MT | CF Roof | HRE | Catless Eisenmann Race | BPM Sport | Swift | Arkym | Mode Carbon | M.Perf