Cummins 3804694 Ring Set PAI 505051CROSS REFERENCE: 3804694 APPLICATION: L10 Natural Gas Multiple Use Application BRAND: PAI 505051 Cummins 3804694 Ring Set PAI 505051. Aftermarket truck parts and truck repair parts. Maintains piston sealing and supports stable compression for dependable operation. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified company with over 50 years of experience in the heavy duty truck parts industry. This