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Mahle OE Napier Steel second‑ring plain set, sized 4.125 in x 1.0 mm (.136 in RW), packaged as a bulk quantity for rebuilders. These plain second rings match the specified bore and ring thickness for engines requiring that Napier Steel geometry and are supplied to support piston ring replacement and engine reconditioning projects where maintaining correct ring dimensions is essential.
Mahle Rings Perf Napier Steel 2nd Ring 4.125in x 1.0MM .136in RW Plain Ring Set (48 Qty Bulk Pack)
