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ACL main bearing set for Chevrolet four‑cylinder 121 engines, covering 1987–1996 applications. The matched crankshaft bearings restore correct oil clearance and main journal support during overhaul or maintenance. Use this kit when main bearings show wear or tolerances have drifted to bring the bottom end back to specified running condition.
ACL Chevrolet 4 121 1987-96 Engine Crankshaft Main Bearing Set
