ACL BMW S85B50 5.0L V10 .50mm Oversized Main Bearings

You get a full set of main bearings in this kit, which means one box handles the critical bottom-end rebuild for your engine. These ACL main bearings are specifically made for the BMW S85B50 5.0L V10 engine found in the 2006-2010 M5. Main bearings are essential for keeping your crankshaft properly supported and spinning smoothly within the engine block. When rebuilding or repairing your engine, especially with higher mileage or performance applications, replacing these bearings is a key step to ensure long-term reliability.

This particular set is .50mm oversized, meaning they are designed to be used when the crankshaft journals have been machined down by 0.50mm to clean up wear or damage. This allows for a fresh, tight tolerance fit on the crankshaft. ACL is known for making well-built engine components, and these bearings are constructed to meet the demands of the high-revving S85 V10. They are designed to provide solid support for the crankshaft under demanding conditions.

When you're diving into an engine rebuild, especially for a complex engine like the S85, using the correct, precisely sized components is crucial. Make sure to confirm your crankshaft has been machined to the correct 0.50mm undersize before ordering these bearings. Always refer to the manufacturer's installation instructions for proper torque specifications and assembly procedures.