The ACL main bearing set includes a note recommending replacement 3M2637A-.25 when stock is exhausted; it is identified as an engine crankshaft main bearing set for the applicable application. Use this bearing set during engine overhaul to reestablish correct crankshaft support and clearances, and follow the suggested substitute part number if original stock is unavailable.

ACL WHEN STOCK EXHAUSTED USE 3M2637A-.25 Engine Crankshaft Main Bearing Set