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The Mahle OE plain second ring set is a replacement Napier steel 2nd ring sized 4.030 in x 1.0 mm (.136 in) intended for piston rebuild work. Offered as an OE-quality plain ring, it suits engine overhaul and repair tasks where accurate ring dimensions and material consistency matter. This pack provides standard second-ring specification for applications matching the listed size.
Mahle Rings Performance Napier Steel 2nd Ring 4.030in x 1.0MM .136in RW Plain Ring Set
