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The Mahle OE plain piston ring set is a performance steel second (Napier) ring sized 4.250 in with a .043 in thickness and .135 in ring width, supplied as a plain ring set for routine engine repairs. These rings are intended as direct replacements during piston servicing to restore cylinder sealing and maintain proper compression in rebuild applications.
Mahle Rings Performance Steel Napier 2nd Ring 4.250in x .043 .135in RW Plain Ring Set
