MAHLE 42115CP.010 Premium Engine Piston Ring Set Over - 0.010

The MAHLE 42115CP.010 is a premium oversize engine piston ring set engineered to OE form, fit, and function standards. As one of the world's largest original equipment piston ring manufacturers, MAHLE brings the same advanced materials and technology found in factory engines directly to the replacement parts market. This set is sized at +0.010 in. oversize, making it the correct choice for engines that have been bored 0.010 in. over standard.

Key Features:

• SAE 9254 High-Alloy Steel Construction — Provides higher tensile and yield strength, extended fatigue resistance, and increased material hardness for long service life
• Barrel-Faced Compression Ring — Upper compression ring features a barrel-faced contact area and CNC-controlled gap chamfer for optimized compression and reduced blow-by
• Reverse Twist Intermediate Ring — The second ring uses a reverse twist (Napier-style) design with taper race machining for superior groove-side sealing and enhanced oil control
• CP-20 Oil Ring Assembly — Exclusive 20-degree ear angle provides the best possible side seal against the cylinder wall; chemically polished expander promotes enhanced oil drain-back
• Pre-Lapped Finish — Rings are pre-lapped at the factory to seat immediately, virtually eliminating break-in time
• OE-Optimized Tension — Ring tension, materials, and coatings are all application-specific, reducing friction and minimizing oil consumption
• +0.010 In. Oversize — Designed for use in engines bored 0.010 in. over standard cylinder bore diameter

MAHLE piston ring sets are trusted by professional engine builders for their installer-friendly design and uncompromising quality. Each ring in the set is manufactured to strict OE specifications, ensuring proper fitment and reliable, long-term performance in rebuilt or freshened engines.