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The ACL Race Series main bearing set for BMC Mini inline-4 engines (from 1983 onward) is a high-performance main bearing kit specified at .25mm oversize to suit stroked or machined cranks. It supplies the increased journal diameter tolerance required for oversized applications, offering a performance-oriented bearing option when rebuilding or modifying Mini inline-4 engines.
ACL BMC Mini Inline 4 (from 1983 up) .25mm Oversized High Performance Main Bearing Set
