MAHLE 51130CP Engine Piston Ring Set with CP-20 Oil Ring Assembly

The MAHLE 51130CP is a premium OE-replacement engine piston ring set engineered to restore proper compression, minimize oil consumption, and extend engine service life. Built to original equipment specifications, this ring set is ideal for professional engine rebuilders and serious DIY mechanics seeking a direct, reliable replacement.

Key Features:

• Installer-Friendly Design: Rings are pre-lapped to seat quickly, virtually eliminating break-in time and simplifying installation
• Optimized Materials & Coatings: Ring materials, coatings, and tension are all engineered for reduced friction and long service life
• Barrel-Faced Compression Rings: The top compression ring features a barrel-faced contact area with a CNC-controlled gap chamfer to maximize compression efficiency and reduce blow-by
• Reverse-Twist Intermediate Rings: The second ring uses a reverse twist design for superior groove side sealing, paired with taper race machining to improve cylinder wall contact
• CP-20 Oil Ring Assembly: Features MAHLE's exclusive 20-degree ear angle for optimal side sealing against the cylinder wall, plus a special chemical polish on the oil ring expander for enhanced oil drain-back
• OE-Quality Construction: Designed and manufactured to meet original equipment tolerances and specifications for a precise, confident fit

The MAHLE 51130CP piston ring set delivers the performance and durability that engine builders demand, backed by MAHLE's decades of expertise as a global OE supplier to major automotive manufacturers.