NCY 88cc Aluminum Performance Cylinder Head. Great quality alloy cylinder head designed to work seamlessly with 1100-1237 88cc cylinder kit. Give your QMB139 the power to actually get some respect. You can use this cylinder on all QMB139 engines from SYM, Kymco, QLink, Filly 50 as well as other Chinese scooters with the QMB139 engine. Note:Rocker arm assembly (part # 1100-1326) may be required for some models. Please check the valve stem height, as it relates to the rocker arms installation. Be sure to add an exhaust, upgrade your carburetor and air filter for a complete upgrade.