Mahle 42066CP Engine Piston Ring Set

Mahle 42066CP Piston Ring Set

The Mahle 42066CP engine piston ring set is built for precision sealing, controlled oil management, and reduced friction in performance and OE-style rebuilds. It is a premium-grade ring set with a 4.065 in bore diameter, shallow groove sizing, and advanced face materials for consistent cylinder sealing.

Compatible With 2009-2015 Cadillac CTS, 2012-2015 Chevrolet Camaro, and 2009-2013 Chevrolet Corvette applications, this Mahle piston ring set supports engines that require standard bore sizing and shallow groove ring configuration. The 42066CP is engineered to meet demanding cylinder block component requirements while helping maintain compression and oil control.

Key Features

• Part number 42066CP for direct identification
• 4.065 in bore diameter with standard oversize specification
• Premium item grade for rebuild-focused applications
• Plasma-Moly piston ring face coating for improved wear resistance
• Top ring material: carbon steel
• Second ring material: ductile iron
• Oil ring assembly material: GNS
• Shallow groove ring size configuration
• Designed for reduced friction and controlled oil consumption

Detailed Description

Mahle 42066CP piston rings are engineered around OE-driven requirements for sealing efficiency, lower friction, and long service life. The ring set uses a plasma-moly face coating on the top ring, a carbon steel top ring, a ductile iron second ring, and a GNS oil ring assembly to support stable cylinder pressure control and oil scraping performance. For builders searching for a Mahle 42066CP piston ring set for Cadillac CTS, Chevrolet Camaro, or Chevrolet Corvette engine rebuilds, this configuration matches standard bore, shallow groove applications with premium material selection.

This part cross-references no listed alternate part numbers in the provided data.

What It Helps Address

• Low compression from worn or fatigued piston rings
• Excessive oil consumption caused by ring wear
• Blow-by from poor cylinder sealing
• Reduced ring control in high-mileage or rebuilt engines
• Friction-related wear in the cylinder wall and ring package

Installation Notes and Tips

Verify bore diameter, ring groove depth, and ring end gap before installation. Clean the piston ring lands thoroughly and confirm the shallow groove specification matches the engine build. Follow the engine builder’s ring orientation, gap placement, and break-in procedure for the specific Cadillac CTS, Chevrolet Camaro, or Chevrolet Corvette application.

Quality Assurance

Mahle manufactures piston rings to OE-level engineering standards with an emphasis on friction reduction, oil control, and service life. The 42066CP reflects Mahle’s technical approach to modern ring design for engine rebuild applications.