King Engine Bearings MB 580AM1.25 Main Bearing Set Toyota 21R 1.25mm Oversize

The King Engine Bearings MB 580AM1.25 is a complete main bearing set designed for the Toyota 21R engine, supplied in a 1.25mm oversize specification to accommodate crankshafts that have been machined undersize during engine rebuilds. This bearing set is manufactured using King's proven bi-metal aluminum-based material (AM series), equivalent to SAE-783, making it well-suited for passenger car engines operating under low to medium load conditions.

Key Features:

• AM Series Bi-Metal Construction – Aluminum-based material on a steel backing, equivalent to SAE-783 specification
• 1.25mm Oversize – Engineered for crankshafts that have been reground 1.25mm undersize
• Complete Main Bearing Set – Includes all main bearing shells required for a full engine rebuild
• Precision Tolerances – Manufactured to tight dimensional tolerances for proper oil clearance and crankshaft support
• King Quality Standards – Produced by a specialist bearing manufacturer with decades of engine bearing expertise

King Engine Bearings has been a specialist in the engine bearing industry since 1960, offering a wide range of bearings for automotive, light- and heavy-duty truck, marine, aviation, and standby power applications. The MB 580AM1.25 is an ideal choice for builders performing a complete overhaul on a Toyota 21R engine where the crankshaft main journals require an oversize bearing to restore proper operating clearances.