King Engine Bearings MB 522AM0.5 Main Bearing Set 0.50mm Undersize

The King Engine Bearings MB 522AM0.5 is a complete main bearing set engineered for Peugeot 504 engines. This set is manufactured in 0.50mm undersize, designed for use with reground or undercut crankshafts that have been machined to the corresponding undersize specification.

King Engine Bearings produces these main bearings using their advanced bimetal aluminum (AM-Series) construction, which consists of a high-strength steel backing bonded with a precision aluminum-tin alloy overlay. This design delivers excellent load capacity, fatigue strength, and corrosion resistance — making it a reliable choice for engine rebuilds and restorations.

Key Features:

• Complete main bearing set for Peugeot 504 engines
• 0.50mm undersize for use with reground crankshafts
• Bimetal aluminum (AM-Series) construction for high load capacity and durability
• High-strength steel backing with aluminum-tin alloy surface layer
• Precision-engineered to tight OEM tolerances for proper oil clearance
• Excellent fatigue resistance and corrosion resistance
• King pMax black coating technology may be applied for enhanced wear-in performance

King Engine Bearings is an ISO-certified manufacturer trusted by professional engine builders worldwide. The MB 522AM0.5 is an ideal solution for Peugeot 504 engine rebuilds where the crankshaft has been turned undersize, restoring proper bearing clearances and extending engine service life.