King Engine Bearings MB5283HP.026 HP-Series Main Bearing Set Ford DOHC/SOHC - V8 4.6L 24V

The King Engine Bearings MB5283HP.026 is a high-performance HP-Series crankshaft main bearing set engineered for the Ford V8 4.6L DOHC/SOHC 24-valve engine family. This set is offered in a +0.026mm oversize to accommodate lightly reground or worn crankshaft journals, and includes 5 pairs of precision-ground bearing shells.

Built on King's Alecular bi-metal aluminum silicon alloy construction, the HP Series delivers a harder top layer than traditional Babbitt-overlay tri-metal bearings — making it the preferred choice when Babbitt extrusion or material migration has become a concern. This design is particularly well-suited for high-load, short-duration race applications such as drag racing, tractor pulls, and monster truck competition, as well as street/strip and circle track builds using nodular cast iron crankshafts.

Key Features:

• HP-Series bi-metal aluminum silicon alloy (Alecular) construction — harder than Babbitt for improved resistance to extrusion and material migration
• Load capacity rated at 8,000 PSI — suited for high-load and medium-duration engine applications
• Greater eccentricity for superior oil film maintenance at high RPM
• Chamfered oil holes for enhanced oiling throughout the bearing surface
• Chamfered edges designed to accommodate large-radius crankshaft fillets
• Optimized crush height for proper bearing-to-housing fit and consistent clamping load
• Tight wall thickness tolerance — outperforms industry standard, minimizing shell-to-shell variation
• Captured thrust bearing style
• Includes 5 pairs (full main bearing set)
• Oversize: +0.026mm

The MB5283HP.026 is designed for Ford 4.6L MOD engine applications with aluminum blocks, including Teksid, WAP, and current production aluminum block variants. Compatible with both DOHC and SOHC 24-valve configurations. Cross-references include ACL 5M5647H and Clevite MS2259H.