ACL BMW M20/M50/M52/M54 - 1919CC 80.0mm Bore 66.0mm Stroke .025 Oversized Main Bearing Set

When you're rebuilding or refreshing the bottom end of your BMW M20, M50, M52, or M54 engine, a solid set of main bearings is crucial. This set from ACL is specifically sized at .025 inches undersize, meaning it's intended for crankshafts that have been machined down to match this size. Getting the right bearings is key to ensuring proper oil clearance, which is vital for engine longevity and performance.

ACL has been making engine bearings for a long time, and this set is well-built for the demands of these popular BMW engines. They're made to handle the stresses of daily driving and performance use alike. Installing these bearings is part of a larger engine rebuild process, so make sure you have the necessary tools and knowledge, or consult a professional mechanic to ensure the crankshaft journals are properly prepped and measured before installation.

This set is designed for specific BMW engines and requires a crankshaft that has been machined to the .025 inch undersize specification. Always refer to your engine's service manual for the correct installation procedures and torque specifications.