Putting a Tuning Cam in your engine you should use also this adjustabla cam gear for exact adjustment and best performance of your engine! Adjustable cam gears are made from the highest quality aluminum. They are CNC machined to more exacting tolerances than original gears.The tooth edges are beveled to increase belt life. 2 wheels in this kit. Only suitable for Polo 16V 1,4L and 1,6L with Lifters like on engine code AFH. The OEM cam wheels MUST have this VW number 036109111. Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com