This main bearing and guide shell set is designed for N63B44, N63TUB44, S63B44, S63TUB44 4.4L V8 (4395cc) twin-turbo engines and N63B40 4.0L V8 (3982cc) twin-turbo engines.The set includes 10 pieces of main bearings and guide shells.It is compatible with N63 and S63 engine models used in various vehicle applications produced between 2007 and 2020.This set corresponds to OE specifications 11217576757, 11217576766, 11217576760, and 11217576763, and is compatible with replacement part numbers 11217576758, 11217576759, 11217604922, 11217604923, 11217604924, 11217846377, 11217576767, 11217576768, 11217576761, 11217576762, 11217604925, 11217604926, 11217604927, 11217846378, 11217576764, and 11217576765.