ACL main bearing set supplied with a manufacturer alternate reference when the original part is unavailable; alternate reference 5M1705A-.25 is indicated. This crankshaft main bearing kit restores main-to-crank clearances and provides matched shells for engine rebuilds. Supplied as a complete set sized for direct replacement where the referenced number applies.

ACL WHEN STOCK EXHAUSTED USE 5M1705A-.25 Engine Crankshaft Main Bearing Set