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ACL Race Series main bearings for Mitsubishi 4G63/4G64 6-bolt 1st-generation DSM engines are standard-size high-performance mains intended for engine rebuilds. Supplied to match OEM journal dimensions, these bearings support reliable crankshaft fit and operation during assembly and are specified for use in 6-bolt 1st-gen DSM rebuilds where standard main sizing is required.
ACL Mitsubishi 4G63/4G64 6 Bolt 1st Gen DSM Standard Size High Performance Main Bearing Set
