MAHLE 41856CP.040 Perfect Circle Premium Piston Ring Set Oversize - 040

The MAHLE Perfect Circle 41856CP.040 is a premium piston ring set engineered to deliver exceptional sealing performance, oil control, and long-term engine reliability. Designed as a .040" oversize set, this ring package is ideal for engine rebuilds where cylinders have been bored 0.040" over the standard diameter.

MAHLE Perfect Circle is one of the most trusted names in OEM and aftermarket piston ring manufacturing, supplying rings to major engine builders and professional rebuilders worldwide. These rings are precision-manufactured to meet or exceed original equipment specifications, ensuring proper fit, function, and durability.

Key Features:

• Premium-grade piston ring set in .040" oversize for bored engine applications
• Engineered to OEM specifications for precise fitment and reliable sealing
• Superior oil control ring design reduces oil consumption and blow-by
• Advanced surface treatments and coatings promote fast, even ring seating
• Manufactured from high-quality cast iron and/or steel alloys for durability and wear resistance
• Compression rings designed to maintain consistent cylinder pressure under demanding conditions
• Compatible with standard engine rebuild procedures — no special tools required

Whether you are performing a complete engine overhaul or replacing worn rings after a bore job, the MAHLE Perfect Circle 41856CP.040 piston ring set delivers the professional-grade quality and performance that engine builders demand. MAHLE's stringent quality control processes ensure every set meets exact tolerances for a confident rebuild.