MAHLE 51284CP.020 Engine Piston Ring Set - 0.020 in. Oversize

The MAHLE 51284CP.020 is a premium engine piston ring set ground to 0.020-inch oversize specifications, engineered for engine rebuilds requiring slightly larger bore diameters. MAHLE is a globally recognized OEM and aftermarket supplier trusted by professional engine builders for precision-manufactured piston rings that meet or exceed original equipment standards.

Key Features:

• 0.020-inch (0.50mm) oversize for engines that have been bored or honed to accommodate worn cylinder walls
• CP-20 Oil Ring Assembly featuring a proprietary 20-degree ear angle for optimal side sealing against the cylinder wall
• Chemically polished oil ring expander for enhanced oil drain-back and reduced oil consumption
• Upper compression ring (UCR) features a Plasma-Moly face coating for superior wear resistance and faster seating
• Lower compression ring (LCR) constructed from cast iron for reliable sealing and long service life
• Oil control ring (OCR) features a chrome-faced stainless steel construction for durability and corrosion resistance
• Manufactured to OEM tolerances for consistent gap spacing, ring tension, and axial height
• Complete set includes rings for all cylinders in the application

MAHLE piston rings are manufactured using advanced materials and surface treatments to restore compression, minimize blow-by, and reduce oil consumption in rebuilt engines. The CP-20 series oil ring design is an exclusive MAHLE feature that ensures precise cylinder wall contact and long-term sealing performance. This set is ideal for full engine rebuilds, overhaul projects, or any application where cylinder bores have been machined to 0.020-inch over standard dimensions.