MAHLE 41873CP.020 Premium Engine Piston Ring Set Oversize Plasma-Moly - 0.020

The MAHLE 41873CP.020 is a premium-grade engine piston ring set engineered for 0.020" oversize bore applications. MAHLE is the world's largest manufacturer of piston rings, and this set reflects their deep OEM engineering expertise and rigorous quality standards.

These rings are pre-lapped at the factory for immediate seating, virtually eliminating break-in time and simplifying installation for professional engine builders and experienced rebuilders alike. Ring materials, coatings, and tension levels are all precisely optimized to minimize friction and maximize service life for the specific application.

Key Features:

• Plasma-moly top compression ring — cast iron construction with plasma-moly facing for superior wear resistance and cylinder sealing
• Barrel-faced compression ring contact area — promotes efficient compression and reduces blow-by
• CNC-controlled gap chamfer on compression rings optimizes ring seal and controls combustion pressure
• Reverse twist intermediate ring — improves groove side sealing with taper-race machining for enhanced cylinder wall contact
• CP-20 oil ring assembly — exclusive 20-degree ear angle design delivers superior side sealing against the cylinder wall
• Chemically polished oil ring expander — enhances oil drain-back for better oil control
• 0.020" oversize bore — designed for engines bored 0.020" over standard dimensions
• Ring thickness: 1.5mm upper compression, 1.5mm intermediate, 3.0mm oil control (typical for this series)

MAHLE Original premium piston ring sets carry forward the trusted Perfect Circle legacy — relied upon by professional automotive technicians for over 100 years. The 41873CP.020 delivers the precision engineering and installer-friendly design that make MAHLE the ring of choice for today's engine rebuilds.