Got the ACM Mod done this weekend (shout-out to the ACM guys - thanks fellas).
I am very impressed with the results. For those on the edge about it, it gives the car a more muscular character especially in city driving and lower revs, almost a bit AMG like, would definitely recommend it!
Took a video on my phone yesterday, revving the car up to 5K RPM.
'13 E92 M3 Mineral White/Fox Red 6MT
M performance splitters, spoiler, and steering wheel
Megan Race exhaust, Macht Schnell Test Pipes and Stage 2 Intake, ESS Tune
'13 X5 5.0
'14 Audi S4 Glacier White/Magma Red 6MT