MMX Baffled Oil Sump - BMW F2X M135i | M235i | F3X 335i | 435i (N55)Its well documented that the N55 engine found in the M135i and M235i is prone to oil starvation issues when pushed hard on the road and even more so when used on track. The MMX Performance sump baffle has been extensively engineered from the ground up to provide effective oil control, reducing surge and maintaining a more constant oil pressure; it's the ultimate bolt in solution available to protect your engine's longevity. Featuring a total of 7 one