ACL BMW M20/M50/M52/M54 - 1919CC 80.0mm Bore 66.0mm Stroke .25 Oversized Main Bearing Set

200,000 psi tensile strength puts these ACL main bearings well above stock hardware. When you're rebuilding the engine in your BMW, especially one with the M20, M50, M52, or M54 engine, getting the right bearings is critical for long-term health. These main bearings are specifically designed to fit those popular BMW engines, with a 80.0mm bore and 66.0mm stroke, and they come .25mm undersized, which is important if you're machining your crankshaft to match.

ACL is known for making well-built engine components, and these bearings are no exception. They're made with a tri-metal construction that offers a good balance of strength and conformability, helping to protect your crankshaft journals. The .25mm undersize means they're intended for use with a crankshaft that has been ground down by that amount, ensuring a precise fit and proper oil clearance. This is a solid option for anyone doing a performance build or a thorough stock rebuild.

This set includes all the main bearings you'll need for your engine. Make sure to check your crankshaft's condition and specifications before ordering, and always refer to the manufacturer's installation instructions for proper torque and oiling procedures.