MAHLE 42185 Premium Engine Piston Ring Set

The MAHLE 42185 is a premium OE-quality engine piston ring set engineered to deliver reliable sealing, reduced friction, and long service life. MAHLE is the largest piston ring manufacturer in the world, with over a century of experience supplying original equipment and aftermarket applications — making their ring sets the choice of professional engine builders worldwide.

Key Features:

• Pre-lapped finish for immediate seating, virtually eliminating traditional break-in time
• Barrel-faced compression ring contact area for more efficient compression and reduced blow-by
• CNC-controlled gap chamfer on compression rings to optimize sealing performance
• Reverse twist intermediate rings for superior groove side sealing and enhanced cylinder wall contact via taper race machining
• CP-20 oil ring assemblies featuring a 20-degree ear angle for optimal side sealing against the cylinder wall
• Chemical-polished oil ring expander for enhanced oil drain-back performance
• Ring materials, coatings, and tension levels optimized for reduced friction and extended service life

MAHLE Original piston ring sets are engineered to OEM standards, ensuring a proper fit and consistent performance across the entire service life of the engine. Ideal for engine rebuilds, overhaul projects, and high-quality OE-replacement applications.