The Mitsubishi 4D56 and 4D56T Std Size Thrust Washers are specifically designed engine bearings for these particular Mitsubishi engine models. Manufactured by ACL, these thrust washers are crucial components that help reduce friction between moving parts in the engine, ensuring smooth operation and longevity. Ideal for engine rebuilding or maintenance, these thrust washers come in standard size to provide a perfect fit for the specified Mitsubishi engines, offering reliable support and protection for the engine components.