Genuine OEM Audi Piston Rings Set, part number 06J198151F. These rings are critical components of the piston assembly, responsible for sealing the combustion chamber against the cylinder wall and regulating the amount of lubricating oil on the cylinder surface. They are located on the piston within the engine's cylinders. Made from durable materials to withstand high temperatures and pressures, ensuring optimal engine performance and longevity. Genuine OEM piston rings provide precise tolerances and material composition for reliable sealing and oil control.