ACL main bearings for VAG VR6, R32 and R36 engines where the crankshaft has been ground 0.25 millimetre. This is an undersize bearing set and must only be used if the crankshaft has been machined to the correct size. It is not the right choice for a standard crankshaft.
ACL bearings are often used for engine rebuilds, tuning and performance builds where strong and precise bearings are required for the engine crankshaft. Correct bearing size is essential for oil pressure, durability and reliability.
Always check crankshaft dimensions and bearing clearance before installation. Incorrect bearing size can cause serious engine damage.