King Engine Bearings MB5287AM1.0 Main Bearing Set for Toyota 1ZZ-FE 1.0mm Oversize

The King Engine Bearings MB5287AM1.0 is an OE-replacement crankshaft main bearing set designed for the Toyota 1ZZ-FE engine. This set is sized at +1.0mm oversize, making it the correct choice for engines with a reground or undersized crankshaft requiring 1.0mm additional shell thickness. The set includes 5 pairs of main bearing shells to completely service all main journal positions.

These bearings are constructed using King's AM Series bi-metal aluminum-based material — a lead-free composite well-suited for passenger car engines operating under low to medium loads. The aluminum base layer provides excellent conformability and embeddability while meeting modern environmental standards with its lead-free formulation.

Key Features:

• OE-replacement bi-metal construction with aluminum base layer
• +1.0mm oversize — for use with crankshafts ground 1.0mm undersize
• Lead-free aluminum composite — environmentally safe and compliant
• Designed for low to medium load passenger car applications
• Manufactured to exacting tolerances for consistent oil clearance

King Engine Bearings has specialized exclusively in engine bearings since 1960, producing every bearing in-house for strict quality control. The MB5287AM series is available in standard and multiple oversize options to match various crankshaft grinding specifications. Always verify your crankshaft journal diameter before selecting bearing size.