Mahle Rings Plasma Moly Steel Top Comp Ring 4.535in x .0625in .190in RW Ring Set (48 Qty Bulk Pack)

The MAHLE 3011121B piston ring set is engineered for high-performance engine builds requiring a 4.535-inch bore diameter. This premium ring set features advanced plasma-moly steel construction on the top compression ring, providing superior wear resistance and excellent oil control in demanding applications. MAHLE's plasma-moly coating technology delivers a harder, more wear-resistant surface than conventional moly coatings, extending ring life and improving sealing performance. The precise radial wall design ensures optimal cylinder wall contact and ring stability under high-load conditions. This ring set is ideal for performance rebuilds, racing applications, and upgraded engine builds where reliability and power retention are critical.