This is designed specifically for All 1.8T and 2.7L engines. Also works on other cars measuring 25mm (0.986 inch) inner and outer diameter. Made of ultra strong and lightweight metal. Item Type: Turbo Wastegate : for Golf A3 A4 A6 TT 1.8T The Hyrbid valve is capable of 3 different configurations: Hybrid: Atmospheric AND Recirculation Operation 100% Recirculation Mode 100% Atmospheric Mode Fine tuning of the splitter hybrid valve is done by turning the ratchet type cap adjustment knob located on top of the valve. Turning the knob clockwise will stiffen the spring for higher levels of boost retention, while turning the knob counterclockwise will release the spring tension for lower levels of boost retention. Color: Silver Material: Metal Package Contents: 1 x Forged Diverter Valve 1 x Suction Pipe 1 x Circulation Plug 1 x Intake Pipe Plug 2 x O-Ring Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the