CURRENTLY VERIFIED ON S14 ONLY, WAITING S13 VERIFICATION Installs on steering rack between inner tie rod in rack. What version do I need? Look at the shaft side of your steering rack (the side where the steering shaft connects,)Stock - this is for stock inner tie rods without any type of adapters or rack washers to increase angle V1- this is commonly known as the gktech washer which is 6mm in thickness & also Fits Wisefab extensionsV2- this is commonly known as gktech/wisefab adapter with the larger adapter.Modular - this version works fo