Part number: FCPPASTR830085 Manufacturer: FCP Engineering Forged high performance pistons for a variety of applications in almost all types of racing and street engines. Made of 4032-T6 material, molybdenum coated piston bottom. Each piston kit also includes HD series rings and pins. Cylinder diameter: 83.00mm Compression Ratio(CR): 8.5:1 Compression height: 29.00mm Pin diameter: 22mm Stroke: 95.50mm in 236mm stroke diesel engineAudi 200, S2, RS2, S4, S6 - 2.2 2.5 20V Turbo Connecting rod length must be 159mm