Single Convoluted Air Spring. Designed for to slip over your Factory/Performance Struts. (Pressure tube must be less then 2.14 in Diameter) 4.0" Compressed 9.25" Extended 5.875" Diameter Bags made from Synthetic rubber to be resistant against Oil and breakdown that will ruin Natural Rubber. Available in 1/4 NPT Ports MADE IN THE USA! NOTE: The brackets required to install these bags are 2 Flat Plates (Upper and Lower), Bearing Kit (You also can use your factor bearing plate for this application). Using the bearing supplied in the kit will allow you to achive an additional 1" Drop. Applications Include: MKV GTI, Jetta and Rabbit MKIV Golf and Jetta Various other VW's and Audi's that have McPhearson Strut design. 04+ F-150 Front Suspension Ford Expedition Front and Rear Charger, 300C, Magnum Scion Lexus