MAHLE 42136CP.030 Premium Plasma-Moly Piston Ring Set Oversize - 0.030

The MAHLE 42136CP.030 is a premium OEM-quality piston ring set manufactured to exacting original equipment standards. Sized at 0.030-inch oversize, this ring set is engineered for engines that have been bored or honed to the first standard oversize, restoring proper cylinder sealing and oil control to factory specifications.

Key Features:

• Plasma-Moly Top Compression Ring: Positive-twist ductile iron construction with plasma-moly inlay for superior wear resistance, reduced friction, and extended service life
• Pre-Lapped Fit: Rings are pre-lapped at the factory to seat immediately, virtually eliminating break-in time
• Barrel-Faced Compression Ring Contact Area: Promotes more efficient compression and reduces blow-by from the first start
• CNC-Controlled Gap Chamfer: Precision-ground gaps optimize compression sealing and minimize combustion gas leakage
• Intermediate Ring with Reverse-Twist Design: Enhances groove side sealing and features taper-race machining for improved cylinder wall contact
• CP-20 Oil Ring Assembly: Exclusive 20-degree ear angle provides optimal side sealing against the cylinder wall; chemical-polished expander promotes enhanced oil drain-back
• Optimized Ring Tension: Ring materials, coatings, and tension are application-specific to reduce friction and extend engine life
• OE-Driven Engineering: Designed to meet or exceed original equipment specifications for compression, oil control, and durability

MAHLE is a Tier 1 OEM supplier to major global automakers and brings that same engineering expertise to their replacement ring sets. The 42136CP.030 piston ring set is the professional's choice for engine rebuilds requiring the first oversize bore, delivering a reliable, installer-friendly solution that meets the demands of daily driving and extended engine life.