Genuine OEM Audi Piston Ring Set, part number 06E198151B. This set of piston rings is a critical internal engine component, designed to create a tight seal between the piston and the cylinder wall. The rings perform multiple functions: sealing the combustion chamber to maintain compression, regulating oil consumption by scraping excess oil from the cylinder walls, and transferring heat from the piston to the cylinder wall. Manufactured to precise tolerances, these rings are vital for engine efficiency and longevity. Using genuine OEM piston rings ensures the correct material composition, tension, and dimensions for optimal sealing, reduced friction, and reliable engine operation.