Performance Main Bearings

The King Engine Bearings MB5259XPC is a set of performance main bearings engineered for Honda A, B, and K Series engines. These bearings utilize King's revolutionary pMaxKote™ technology, a unique polymer coating with ceramic nano-composite particles that functions as a fourth layer to significantly enhance wear resistance. This coating is applied directly over King's pMaxBlack™ overlay during the manufacturing process, increasing hardness without altering the bearing's original precision wall thickness. The pMaxKote™ coating provides several key benefits, including superior seizure resistance, cavitation resistance, wear resistance, and enhanced protection against oil starvation. The bearings are constructed from a tri-metal, copper-lead nickel material and feature a grooved upper design with a 1/2 style groove. They are sold as a set of 5 and are designed for stock crankshaft undersize dimensions.