QSB4.5 Cummins Bushing 4891178 Parts Catalog Ref No. Part Name Part No. Required 1 Engine Connecting Rod 3954658 6 　 Engine Connecting Rod 3954657 1 2 Connecting Rod Cap Screw 4891179 2 3 Bushing 4891178 1 4 Engine Piston Kit 3800756 6 　 Piston 3935591 1 5 Retaining Ring 3901706 2 6 Piston Ring Set 3802831 1 7 Piston Pin …