King Engine Bearings MB 798AM0.5 Main Bearing Set BMW M20 M50 M52

The King Engine Bearings MB 798AM0.5 is a complete main bearing set engineered for a range of BMW inline-four and inline-six engines, including the M20B20, M20B23, M20B25, M20B27, M50B25, M52B20, M52B25, and M52B28. This set is offered in a +0.5mm undersize specification, making it ideal for engine rebuilds where crankshaft journals have been reground to restore proper running clearances.

Key Features:

• Bi-Metal Aluminum Construction – Manufactured from a standard aluminum-based material equivalent to SAE-783, delivering reliable performance in low to medium load engine applications
• +0.5mm Undersize – Precision-ground to accommodate reground crankshaft journals for proper oil clearance restoration during engine overhaul
• Direct Replacement – Designed as a drop-in replacement for original equipment main bearings in compatible BMW M-series engines
• Engine Compatibility – Fits BMW M20B20, M20B23, M20B25, M20B27, M50B25, M52B20, M52B25, and M52B28 engines
• King Quality Manufacturing – Produced by King Engine Bearings, a globally recognized OEM and aftermarket bearing supplier with strict dimensional and metallurgical standards

Whether you're performing a full engine rebuild or addressing excessive main bearing wear, the MB 798AM0.5 provides a precision-fit, durable solution trusted by professional engine builders worldwide.