Engine Overhaul Rebuild Kit For Cummins B5.9 6BT 6BT5.9 6BTA5.9 6BTAA5.9 engine. Piston:6 Units (2). Piston Ring:6 Units (3). Piston Pin:6 Units (4). Piston Clip:12 Units (5). Piston Pin Bush:6 Units. Intake Valve:6 Units 3. Exhaust Valve:6 Units 4. Intake Valve Guide:6 Units 5. Exhaust Valve guide:6 Units 6. Intake Valve Seat:6 Units 7. Exhaust Valve Seat:6 Units 8. Main Beraing: 1 Set 9. Con Rod Bearing:1 Set 10. Thrust Plate:1 set 11. Full Gasket Set:1 Set.