The ACL main bearing set (5M909P) is an engine crankshaft main bearing kit supplied with a +0.040 in oversize flange. It serves as a replacement main bearing set when a +0.040 oversize flanged bearing is required, providing matched flanged shells to support the crankshaft journals. The description highlights the oversize specification and the set's purpose as a crankshaft main bearing replacement.
ACL 5M909P + .040 O/W FLANGE Engine Crankshaft Main Bearing Set