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ACL Race Series oversized main bearing set for BMW M40B16/18 engines provides .25" oversize main bearings for engines machined to that specification. These bearings restore correct crank-main clearance and help reestablish proper oil film and rotational support during rebuilds. They are specified parts for engine reconditioning where precise bearing sizing is required to meet service limits.
ACL BMW M40B16/18 (1.6L / 1.8L / 1.9L) .25 Oversized Main Bearing Set
