My friends M135i already makes this "pooosht" noise when lifting off the throttle. Does all N55 cars come with this sound from factory, or is it Mx35i specific, or did the previous owner install an aftermarket POV?
PS this video we made yesterday of his M135i vs my Z4 OEM/ESS might be of interest to you as well
http://www.1addicts.com/forums/showt...php?p=15968398