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The Mahle Performance plasma steel top ring set for 4.135" bore applications uses HVOF-applied molybdenum to resist scuffing and extend service life. With a 1.0mm thickness and .143" radial width, this top ring provides hardened sealing at the combustion interface and consistent manufacturing tolerances, making it suitable for precision engine rebuilds that require reliable top‑ring protection and dimensional accuracy.
Mahle Rings Performance Plasma Steel Top Ring 4.135in x 1.0MM .143in RW HVOF Moly Ring Set
