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ACL standard main bearing set for BMW M40B16/18 engines supplies factory-dimension main bearings for standard rebuilds. Use these bearings when the crankshaft journal dimensions are within OEM tolerances to restore proper clearance and oil film at the main journals. They are a direct replacement option for routine engine assembly or maintenance without machining.
ACL BMW M40B16/18 (1.6L / 1.8L / 1.9L) Standard Main Bearing Set
