6BTCummins Engine Piston 3926631 Parts Catalog Ref No. Part Name Part No. Required 1 Piston Pin 3934047 6 2 Connecting Rod Bearing 3969562 6 3 Connecting Rod Bearing 4893693 6 Engine Connecting Rod 4943979 6 4 Engine Connecting Rod 4943978 1 5 Bushing 4891178 1 6 Connecting Rod Cap Screw 4891179 2 7 Oil Piston Ring 3932520 6 8 Compression …