MAHLE 41585.020 Engine Piston Ring Set - 0.020 in. Oversize

The MAHLE 41585.020 is a premium engine piston ring set machined to a 0.020-inch oversize bore specification, designed for engines that have been bored or honed to restore proper cylinder tolerances. MAHLE is the world's largest piston ring manufacturer, and every set in this lineup is engineered to OE standards for reliable, long-lasting engine sealing.

Key Features:

• 0.020 in. (0.50mm) Oversize — engineered for engines bored 0.020" over standard to restore proper piston-to-wall clearance
• Premium ring materials — upper compression ring in cast iron with plasma-moly facing; lower compression ring in cast iron; oil control ring in stainless steel with chrome facing
• Pre-lapped finish — rings are pre-lapped at the factory to seat immediately, virtually eliminating extended break-in time
• Barrel-faced top compression ring — promotes efficient compression sealing and reduces blow-by
• Reverse-twist intermediate ring — provides enhanced groove side sealing for improved oil control
• CP-20 oil ring assembly — features a 20-degree ear angle for optimal cylinder wall contact and a chemically polished expander for improved oil drain-back
• CNC-controlled gap chamfer — ensures consistent ring end gap for reduced blow-by and improved compression
• Optimized ring tension — materials, coatings, and tension are application-matched for reduced friction and extended service life

MAHLE Original piston ring sets meet or exceed OEM specifications and are trusted by professional engine builders for both stock rebuilds and performance applications. The complete set includes all rings required for one engine.