Really need before and after which I have not done. However, since I can't seem to find an F10 dyno'd with Eisenmann race, I may do that just to see ( although no internal control unfortunately.) I'm not expecting much from an axle back system.
F10 30 Jahre M5/F80 30 Jahre M3
F82 M4 GTS
E36 M3 with S54 Swap/F22 M235 Dinan Stage 4
X15 X5 3.5i/03 Cooper S (Maxi Tuned +50bhp)
60 Impala (43k orig mi)