MAMBA Forward Heavy Duty Turbo Repair Kit / BMW N63 4.4L X5 X5 550i MGT2256S TW
MAMBA Heavy Duty Turbo Repair Kit / Forward Garrett MGT2256S 793647-1 BMW E71 X5 X6 550i 650i 750i Biturbo 4.4L N63. BMW N63 4.4L V8 X5, X6, 550i, 650i, 750i MGT2256S. It is the kit you need once you install bigger wheel for BMW N63 twin forward turbo.