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Mahle OE Napier Steel second‑ring plain set sized 4.100 in x 1.0 mm (.136 in RW) supplies a direct replacement ring for engines using that bore specification. Intended for engine rebuilds and repairs, this plain second ring matches the required diameter and thickness for proper ring pack assembly and helps restore sealing performance when replacing worn or damaged rings.
Mahle Rings Performance Napier Steel 2nd Ring 4.100in x 1.0MM .136in RW Plain Ring Set
