The ACL Trimetal main bearing set for Chevrolet Gen III V8 engines (4.8/5.3/5.7/6.0L, 1997‑on) is a crankshaft main bearing kit that specifies oil groove details: intermediates have a 120° oil groove on the upper, while the thrust bearing has a 180° oil groove on the upper. This set provides the bearing surfaces needed to support crankshaft rotation and is intended for crank installations and engine rebuilds on the listed Gen III V8 applications.

ACL TRIMETAL - Chevrolet V8 4.8/5.3/5.7/6.0L Gen III 1997-on Engine Crankshaft Main Bearing Set