CSF High Performance Race Spec Engine Oil Cooler - BMW FXX M135i | M235i | 335i | 435i (N55)It's no secret that the N55, when driven under high loads for sustained periods of time or in high ambient conditions, it has an engine oil temperature problem. Owners often see temperatures in the region on 130C + and often going into the 140C+ region if care isn't taken. High operating temperatures can reduce the longevity of engine components and ultimately result in failures, sooner. To give owners more engine cooling performance which can allow