Genuine OEM Audi Engine Piston, part number 079107066EP. This critical internal engine component is responsible for converting the energy from combustion into mechanical force, which then drives the crankshaft. It operates within the engine's cylinders, forming a seal with the cylinder walls via piston rings. Constructed from high-strength alloys to withstand extreme temperatures and pressures, this piston weighs approximately 0.517 kg. Choosing a genuine OEM piston ensures precise dimensions, correct compression ratios, and material integrity for optimal engine performance and longevity.