Clevite 42146CP Plasma-Moly Piston Ring Set

The Clevite 42146CP is a plasma-moly piston ring set engineered for reliable engine rebuilds and high-performance applications. Part of the trusted Clevite CP-series line — now produced under the MAHLE brand umbrella — this ring set is built to OEM-quality standards with premium materials and advanced coatings designed to restore cylinder sealing and engine efficiency.

Clevite CP-series piston rings feature a plasma-moly (plasma-molybdenum) facing on the upper compression ring, which dramatically improves wear resistance and reduces break-in time compared to standard cast iron rings. The three-piece design includes an upper compression ring, an intermediate compression ring, and an oil control ring assembly.

Key Features:

• Plasma-moly upper compression ring for superior wear resistance and fast seating
• Barrel-faced contact surface on the top ring for efficient compression and reduced blow-by
• Reverse-twist intermediate ring for improved groove side sealing
• CP-20 oil ring assembly with 20-degree ear angle for optimal cylinder wall contact and oil drain-back
• CNC-controlled gap chamfer on compression rings to optimize sealing and minimize blow-by
• Standard tension design for a drop-in installation without special tools
• Pre-lapped rings seat quickly, virtually eliminating extended break-in periods
• Ring materials, coatings, and tension optimized for reduced friction and extended service life

Clevite has been a benchmark in engine component quality since powering NASCAR champions, and the 42146CP ring set carries that legacy of precision engineering into everyday engine rebuilds and performance builds alike.