The ACL main bearing set for Nissan RB-series six-cylinder engines fits RB25 and RB30 applications as a direct-replacement crankshaft main bearing kit. Designed for engine rebuilds and maintenance, it supplies the main bearings required to restore correct crankshaft support and clearances during overhaul. Use when servicing RB-family engines to renew bottom-end tolerances.

ACL Nissan 6 RB25/RB30 Engine Crankshaft Main Bearing Set