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The ACL main bearing set is a crankshaft main bearing kit that provides the replacement bearings needed during an engine rebuild or service to maintain proper crank support and bearing clearance. It’s a straightforward parts solution for restoring internal bearing surfaces. This set is specified for Chevrolet 4‑121 applications covering 1983–1986 engines.
ACL Chevrolet 4 121 1983-86 Engine Crankshaft Main Bearing Set
