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The ACL Race Series main bearing set for GM LS Gen III/IV engines in .001 oversize includes a 120-degree oil groove and is supplied in the specified undersize to fit .025mm smaller journals. These main bearings are intended for LS Gen III/IV rebuilds that require precise oil groove configuration and slightly undersized journal clearances for performance or refurbishment projects.
ACL Chevy V8 LS Gen III/IV Race Series .001 Oversized High Performance Main Bearing Set
