King Engine Bearings MB 458AM1.5 Bi-Metal Main Bearing Set Mitsubishi 3.0L V6 6G72 1.5mm Oversize

The King Engine Bearings MB 458AM1.5 is an OE-replacement bi-metal main bearing set designed for the Mitsubishi 3.0L V6 6G72 engine. This set is offered in a 1.5mm undersize to accommodate crankshafts that have been reground beyond standard dimensions, making it an essential component for professional engine rebuilds.

Part of King's AM Series, these bearings are constructed using King's Alecular aluminum-based bi-metal material — an alloy of aluminum, tin, and copper on a high-strength steel backing. This formulation provides excellent macro-particle embeddability, allowing the bearing surface to absorb minor contaminants without causing journal damage. The AM Series is well-suited for passenger car engines operating under low to medium loads.

Key Features:

• Bi-metal construction with aluminum (Alecular) alloy on high-strength steel backing
• 1.5mm undersize for use with reground crankshaft journals
• Lead-free material composition for environmental safety and compliance
• Optimized crush height for proper press fit and bearing retention
• Designed for stable hydrodynamic lubrication and improved oil wedge formation
• Set includes 4 pairs of main bearing shells for the 6G72 V6
• OEM cross-references: MD105269, MD124496, MD357491, MS-1822A

King Engine Bearings has been manufacturing precision engine bearings since 1960, maintaining complete control over raw materials and production processes. The MB 458AM1.5 is the ideal choice for restoring proper crankshaft clearances during a 6G72 engine overhaul.