Clevite H-Series Main Bearing Set 89-24 Ram 5.9L/6.7L Cummins

Building a high-performance Cummins starts with bearings engineered to handle extreme conditions. The Clevite H-Series Main Bearing Set is designed for Ram 5.9L/6.7L Cummins engines that demand superior durability under high cylinder pressures and elevated engine speeds. Whether you're assembling a street performance engine, a dedicated race build, or a heavy-duty towing application, these premium main bearings provide the strength and oil control needed to support your crankshaft in the harshest operating conditions. Available in Standard, 0.25mm (.010") Undersize, and 0.026mm (.001") Extra Clearance Undersize options, you can choose the bearing that best matches your specifications. Manufactured with Clevite's proven H-Series TM-112 tri-metal construction, these bearings feature a hardened steel backing, thin babbitt overlay, medium eccentricity, and high crush for exceptional load capacity and bearing retention. Enlarged chamfers provide additional clearance for crankshafts with oversized fillets, while the flash-plating-free design promotes improved seating during assembly. Originally developed for NASCAR engines, H-Series bearings have become a trusted choice for performance diesel builders seeking long-lasting reliability in medium- to high-RPM applications.