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The ACL Race Series main bearing set is a standard-size kit for Nissan RB30 and RB30ET turbo engines, offered for high-performance rebuilds and replacements. These main bearings support the crankshaft and are specified for standard sizing on RB30/RB30ET applications. Packaged as a complete set, they provide a direct-replacement option when standard clearances are required during engine assembly.
ACL Nissan RB30/RB30ET Turbo Standard Size High Performance Main Bearing Set
