6CT8.3 Cummins Piston 3917707 Parts Catalog Ref No. Part Name Part No. Required Piston 3917707 6 Compression Piston Ring 3919918 6 Oil Piston Ring 3921919 6 Compression Piston Ring 3922686 6 Engine Connecting Rod 5266243 6 Connecting Rod Bolt 3928870 2 Connecting Rod Nut 3934864 2 Bushing 4944137 1 Engine Connecting Rod  5266242 1 Retaining Ring 3920692 12 Piston …