Cummins 6C8.3/6L8.9 Piston Ring Kit 4309525 Parts Catalogue Ref No. Part Name Part No. Required 1 Piston Ring Kit 4309525 6 2 Compression Piston Ring 3928294 6 3 Compression Piston Ring 5267662 6 4 Oil Piston Ring 5296700 6 Above is the introduction of the Cummins 4309525 Piston Ring Kit, while if you need any other Cummins spare parts …