King Engine Bearings MB5799SI Main Bearing Set Oversize - 0.005

The King Engine Bearings MB5799SI is a precision-engineered main bearing set designed for Subaru FA20 and Toyota 4U-GSE engines. This set features 0.005" oversize housing dimensions to accommodate machined engine blocks or worn bearing bores, restoring proper clearances and oil film thickness.

Material Construction:

• Bi-metal silicon aluminum construction for superior durability
• Aluminum-based material strengthened by 2.5-3% silicon content
• Engineered for medium load engines and nodular cast iron crankshafts
• Excellent thermal conductivity and fatigue resistance

Key Features:

• Oversize housing: 0.005" (0.127mm) for precision machining applications
• OE-quality bearings designed for demanding performance applications
• Superior load capacity and wear resistance
• Compatible with Subaru FA20 (BRZ, WRX) and Toyota 4U-GSE engines

King Engine Bearings are manufactured to exacting tolerances using advanced metallurgy and quality control processes. The silicon aluminum alloy provides an optimal balance of strength, conformability, and embedability for reliable engine operation.