Part Number: FCPPASTR815095 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, molybdenum coated piston bottom. Each piston kit also includes HD Series rings and pins. Cylinder bore: 81 .50 mm Compression Ratio (CR): 9.5:1 Height compression: 29.00 mm Pin diameter: 22 mm Stroke: 95.50 mm with a 236 mm long engine block VAG - 2.0 16V Turbo Connecting rod length must be 159 mm