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The Mahle OE plain second ring set is a Napier steel 2nd ring sized 4.020 in x 1.0 mm (.136 in) intended for engine rebuilds and piston service. This OE-quality plain ring supplies standard second‑ring dimensions for applications matching the listed size, providing consistent material and dimensional control for routine overhaul and repair tasks where accurate ring fit matters.
Mahle Rings Performance Napier Steel 2nd Ring 4.020in x 1.0MM .136in RW Plain Ring Set
