Pulley of alternator for all 1.8T engines. Much lighter material than the OEM Pulley. Therefore more power during accelerating! Specially for Turbo engines the Turbo hole is smaller. Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com