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ACL Race Series oversized main bearings for Nissan RB25 and RB30 engines provide a 0.25mm oversize fit for high‑performance builds. These precision main bearings are manufactured to support increased bore dimensions and offer a serviceable upgrade for engine rebuilds and performance applications where correct bearing clearance and durability are required.
ACL Nissan RB25/RB30 0.25mm Oversized High Performance Main Bearing Set
