Cummins 4309389 Cylinder Liner Kit

The Cummins 4309389 cylinder liner kit is a 150 mm outer diameter non-APR (Non-Anti-Polishing Ring) design engineered for 15-liter heavy-duty diesel engines. The kit includes a cast iron cylinder liner with an integral captive shim and a high-temperature silicone sealing ring (typically pink/orange). It is designed to restore combustion chamber geometry and sealing integrity during in-frame overhauls or cylinder-specific repairs. The liner features a precision-honed bore surface for optimal piston ring seating and oil control. This assembly replaces Cummins OEM part numbers 4376430, 4089153, and 4025311. It is compatible with Non-APR engine configurations utilizing the captive shim design for simplified installation and reduced component count. Cross-reference interchange includes aftermarket manufacturer numbers from PAI Industries (161651, 161651E), Interstate-McBee (M-4309389, MCB4309389, MCB4309389-X), Thorite (4309389THO), and DuraFit (DS-4309389). The kit services a single cylinder; six kits are required for a full engine overhaul. Manufacturing standards adhere to ISO 9001/TS16949 quality systems.