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Mahle OE plain ring set listed as Performance Steel Napier second ring sized 3.1890 in bore x 1.2 mm thickness (.135 in RW) supplied as a plain ring set for piston and cylinder rebuilds. The set provides the specified dimensions for matching to pistons and bores during engine service or component replacement tasks.
Mahle Rings Performance Steel Napier 2nd Ring 3.1890in x 1.2MM .135in RW Plain Ring Set
