This replacement kit includes 2 cylinders, 2 pistons, 2 head gaskets, 2 base gaskets, 2 piston pins, 4 circlips, and 2 complete ring sets, all with a 91 mm bore size.Compatible with select BRP 1000 engine models manufactured between 2011 and 2017.Also fits certain BRP 400, 650, 800, 800R, 850, Max 400, Max 650, Max 800, Max 800R, HD8, Max HD8, 1000R, Max 1000R, Max 1000, and HD10 models from specified model years.Replaces the following part numbers: 420929650, 420845109, 420845107, 420845106, 420685714, 420685244, 420630850, 420630210, 420630195, 420613587, 420613586, 420613584, 420613583, 420613582, 420613581, 420413431, 420413430, 420296775, 420296774, 420296770, 420216272, 420216270.