Main Bearings

The King MB5568XPSTDX main bearing set is engineered for high-performance applications, specifically for Honda D-Series, D16A, D16Y, D17, B20, F23A, and F23Z engines. These bearings are constructed with an enhanced tri-metal design, incorporating a layered copper lead construction. This is further reinforced by a nickel plate barrier and a Babbitt overlay composed of lead, tin, and copper. The XP-Series STDX designation indicates a larger internal diameter for increased oil clearance. This provides a thicker oil film, which is crucial for high-performance engines that operate under elevated temperatures and extreme stress. The material composition and design aim to improve durability and performance under demanding conditions.