Main Bearings Guide Set compatible with 550i, 650i, 750i, M5, M6, X5, X6, F10, F85, E70 models equipped with N63 or S63 engines.Designed for 4.0L and 4.4L V8 twin-turbo engines.Includes main bearings and guide shells.Fits N63B40, N63B44, N63TUB44, S63B44, and S63TUB44 engine variants.Meets specifications for dimensional and functional compatibility.Replacement part for OE numbers 11217576757 and 11217576760.