ACL BMW S65B40 4.0L V8 Standard Size Main Bearings

ACL has been making engine bearings for decades, and these standard size main bearings for your 2008-2013 BMW M3 are one of their staples. Designed specifically for the high-revving S65B40 4.0L V8 engine, these bearings are crucial for maintaining proper oil clearance and supporting the crankshaft under demanding conditions. When you're rebuilding or refreshing your M3's engine, getting the bearing specs right is key to its longevity and performance.

These main bearings are well-built with a focus on durability. ACL uses advanced materials and manufacturing processes to ensure they can handle the stresses of a performance V8. They are manufactured to standard size, meaning they are a direct replacement for your original bearings, assuming your crankshaft journals are within factory specifications. Proper installation, including ensuring clean surfaces and correct torque values, is essential for these bearings to perform as intended and protect your engine.

If you're working on your S65 engine, these ACL main bearings are a solid option. They are designed to fit right and provide reliable performance for your BMW M3.