Perfect Circle Moly Piston Ring Set Bore

Perfect Circle moly piston ring sets are engine piston rings built for sealing, durability and consistent performance. The sets are made for engine rebuilds and performance builds. They are also sold as engine piston ring kits, and the plasma moly top ring face is the main feature.

Key Features:

• Plasma moly top ring face: Molybdenum is a hard, wear-resistant material. It helps the ring resist scuffing and wear and supports long service life.
• Combustion and oil sealing: The ring pack is engineered to seal combustion pressure and control oil on the cylinder wall. This helps with compression, oil consumption and engine efficiency.
• Standard tension design: Standard tension gives a balance of sealing and low friction.
• Matched ring pack: Each kit is made for a specific bore application and is offered in a range of bore sizes. Drop-in and file-fit versions are available, depending on the part number.
• Trusted brand: Perfect Circle is a long-established piston ring and engine sealing brand. Its products are now part of the MAHLE Original line.

Each part number in this product line is specific to one bore size and ring configuration. Select the correct variant for your engine build. Proper cylinder preparation, correct ring end gap and careful installation are important for good ring seating and engine life.