Because they mount from the top, what do you have on the underside? just the two nuts to hold it to the tower? seems like the tower may be not flat and the RSM is not sitting flush. Mine mount from below so i have the paper gasket on the underside. Im assuming your gasket is on the top now?
2013 EB 335i xdrive | Msport | Coral | DHP | ZPP | ZCW | ZTP | 400M | Coded | MPerformance Bits | M3 Grills | Painted Reflectors | BMS Exhaust Tips | LED Turn Signals
2011 JB 535i xdrive | ZPP | ZSP | ZCW | 6FL | NAV | 331s Square | MPerformance Spoiler | M5 Grills | Painted Reflectors