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This Mahle OE plain ring set is specified for engine rebuilds and includes second rings made from performance Napier steel sized to 4.310in bore and 1.0mm thickness with a .136in RW dimension. The set is intended for OEM‑compatible replacement during piston ring service or engine overhaul, providing ring geometry and sizing suitable for professional repair or batch rebuilding tasks where plain ring construction is required.
Mahle Rings Performance Napier Steel 2nd Ring 4.310in x 1.0MM .136in RW Plain Ring Set
