The ACL crankshaft main bearing set covering Pontiac four-cylinder 151 engines (1977–1993) and Chevrolet 153ci four-cylinder (1962–1970) supplies main shells for those small-block applications. Provided as a complete main bearing set for rebuilds, these bearings restore proper journal clearance and oil film control to support crankshaft alignment and dependable rotation during engine service and reconditioning.

ACL Pont. 4 151 1977-93 Chev 4 153ci 1962-70 Engine Crankshaft Main Bearing Set