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The ACL .30mm oversized main bearing set is made for Chevrolet big-block V8s (396, 402, 427, 454) from 1965–2000 where crank journals have been reduced by 0.30mm. Use this oversize bearing to restore proper journal diameter and oil clearances during rebuilds. Specifying the correct oversize keeps the rotating assembly aligned and preserves bearing support after machine work.
ACL 1965-2000 Chevy V8 396/402/427/454 .30mm Oversized Main Bearing Set
