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This CP top compression ring is a 1.2mm nitrided, back-cut design sized for a 4.000" bore. The ring is specified as a nitrided, back-cut top ring intended for high-precision rebuilding or replacement on engines using the 4.000" cylinder dimension. Use as a like-for-like service item when matching ring size and bore are required.
CP 1.2mm Nitrided Back Cut Top Ring 4.000 bore
