Genuine OEM Audi Engine Piston Rings Set, part number 07L198151. These rings are crucial for maintaining proper engine compression by sealing the combustion chamber and for controlling oil consumption by wiping excess oil from cylinder walls. They are precisely fitted onto the pistons within the engine's cylinders. The set weighs approximately 0.037 kg. Opting for genuine OEM piston rings guarantees the correct material specifications, precise tension, and dimensional accuracy, which are vital for optimal engine performance, reduced emissions, and extended engine life.