The ACL main bearing set is a replacement kit for certain Buick V6 engines specified in the source, covering select Type L, Type 1 and Type C engines in the 1990–1993 model span. It is intended for engine overhaul and main journal servicing to restore correct crankshaft clearances. Application notes clarify coverage is limited to the engine types and years listed in the product description.

ACL Buick V6 204-231 1990-93 Engine Crankshaft Main Bearing Set