MAHLE 42066CP.020 Premium Piston Ring Set Bore Plasma-Moly - 4.085 V8

The MAHLE 42066CP.020 Premium Piston Ring Set is engineered for high-performance applications requiring a 4.085 inch bore diameter with plasma-moly facing material. This complete V8 ring set features advanced engineering with 1.5mm top ring, 1.2mm second ring, and 2.0mm oil control ring thicknesses, designed to deliver optimal sealing and durability.

Advanced Features:

• Pre-lapped rings seat immediately, virtually eliminating break-in time
• Plasma-moly facing on compression rings for reduced friction and extended life
• Barrel-faced contact area with CNC-controlled gap chamfer for efficient compression and reduced blow-by
• Reverse twist intermediate rings with taper race machining for enhanced groove side sealing
• CP-20 oil ring assemblies with 20-degree ear angle for superior cylinder wall sealing
• Special chemical polish on oil ring expander for enhanced oil drain back
• Carbon steel construction with optimized ring tension

MAHLE Original piston ring sets are designed to be installer-friendly with ring materials, coatings, and tension all optimized for each specific application. This .020 oversize ring set is ideal for performance engine builds and rebuilds requiring precision-bored cylinders. Set includes rings for all eight cylinders.