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ACL main bearing set for Nissan RB25 and RB30 engines, finished as a Race Series high-performance kit with 0.025mm oversize specification. The set provides the correct oversize bearings for blocks machined to that undersize, enabling reliable reassembly after crank journal work. It supplies matched main bearings for a consistent fit during engine rebuilds where a 0.025mm oversize is required.
ACL Nissan RB25/RB30 0.025mm Oversized High Performance Main Bearing Set
