Crankshafts: Heavy Duty OE replacement crankshafts, the most trusted aftermarket crankshaft in the USA.Main Bearings and Seals Kit: Includes all necessary bearings and seals.Complete Engine Gasket Set: Includes all gaskets and seals required for a complete engine rebuild. Main seals are included where applicable. (Note: Water pump seal is not included.)Bottom End Kit Includes:- Crankshaft, Complete Gasket Set, Main Bearings, and Oil Seal Set.