Part Number: FCPPOZ860085 Manufacturer: FCP Engineering Forged high performance pistons for a variety of applications in almost all engine types for racing and street use. Made of 4032-T6, molybdenum coated piston bottom. Each piston kit also includes HD series rings and pins. Cylinder diameter : 86.00 mm Compression ratio: 8.5: 1 Height compression: 30.40 mmPin diameter: 21 mmStroke: 86.00 mmOpel / Vauxhall - 2.0 16V Turbo Z20LET, Z20LER, Z20LEH, Y20LETConnecting rod length must be 143.1 mm