Type: Engine Overhaul Kit Included in this kit: 3 x Pistons with Pins and Clips 3 x Piston Rings 3 x Liner Kit (Semi-Finished Liner) 1 x Upper Gasket Set 1 x Lower Gasket Set 1 x Connecting Rod Bearing Set STD size 1 x Crankshaft Bearing Set STD size 1 x Cranshaft Thrust washer Set, STD Size 1 x Connecting Rod Bushing Set 3 x Intake Valves with Seats and Guides 3 x Exhaust Valves with Seats and Guides Applicable Models for: Kubota Compact Utility Tractor – B2650, B2920 KB23X KB225 Zero Turn Mower – Z300 series ZD331.