MAHLE 42299CP Engine Piston Ring Set

The MAHLE 42299CP is a premium engine piston ring set from MAHLE Original — one of the world's most trusted names in OE and aftermarket engine components. Engineered to meet or exceed OEM standards, this ring set is built for professional engine rebuilders and performance enthusiasts who demand precision, durability, and ease of installation.

This set features MAHLE's signature CP-20 oil ring assembly, which includes a proprietary 20-degree ear angle design that delivers superior side sealing against the cylinder wall. A special chemical polish on the oil ring expander promotes enhanced oil drain-back for improved oil control and reduced consumption.

Key Features:

• Pre-lapped rings seat immediately upon installation, virtually eliminating break-in time
• Barrel-faced compression rings provide a more efficient compression seal and are finished with a CNC-controlled gap chamfer to minimize blow-by
• Plasma-moly top ring coating optimized for reduced friction, wear resistance, and extended service life
• Intermediate rings feature a reverse twist design for enhanced groove side sealing, combined with taper-face machining for improved cylinder wall contact
• CP-20 three-piece oil ring assembly with 20-degree ear angle for best-in-class side sealing and chemically polished expander for superior oil drain-back
• Ring materials, coatings, and tension are all application-optimized for reduced friction and long service life
• Designed for installer-friendly fitment — the preferred choice of professional engine builders

MAHLE is the world's leading manufacturer of over 100,000 OE and aftermarket parts, and their piston rings are among the most technically advanced in the industry. The MAHLE 42299CP delivers the quality and reliability expected from a global OEM supplier in a direct-fit aftermarket package.