I wonder if all Eisenmann Sport make the rattling sound when the valve is closed? I noticed it on Mark's cold start and it is the only thing I don't like about the sport. You can kinda hear it on the vid.
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)