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The Mahle OE plain piston ring set is a replacement plain ring kit sized for a 4.155 in bore with .043 in ring thickness and .135 in RW specification. It restores piston-to-cylinder sealing and helps recover compression lost to wear. Intended for engine rebuilds and routine overhauls, this ring set supplies the basic sealing components needed for reliable combustion chamber sealing.
Mahle Rings Performance Napier THM-13 4.155 x .043 .135in RW Plain Ring Set
