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ACL Race Series oversized main bearing set for BMW M40B16/18 engines provides .025" oversize main bearings to support engines that have been machined to this specification. These main bearings are intended for high-precision engine rebuilds to restore correct crankshaft clearance and bearing oil film. ACL Race Series bearings are specified where exact sizing and reliable main support are required during engine assembly.
ACL BMW M40B16/18 (1.6L / 1.8L / 1.9L) .025 Oversized Main Bearing Set
