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The ACL Trac 3 main bearing set for D155/D179 is supplied as a 0.50 oversized main bearing kit for engine rebuilds needing a half-size main bearing. This matched set provides the specified oversize to meet machining tolerances and is intended as a direct replacement main bearing solution when a 0.50 oversize is required by the engine builder.
ACL International Trac 3 D155/D179 - 0.50 Oversized Main Bearing Set
