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The ACL Race Series main bearing set is a GM LS Gen III–IV main bearing kit with a 270-degree oil groove and .50mm (0.020") undersize. It’s designed for Chevrolet V8 engines in 4.8, 5.3, 5.7 and 6.0L displacements where a race-style main bearing with the specified oil groove and undersize is required. Use it in LS rebuilds needing that groove and undersize.
ACL Chevrolet V8 4.8/5.3/5.7/6.0L Race Series Engine Crankshaft Main Bearing Set
