These are billet aluminum solid offset bushings to lower and center the steering rack in Mk3-3.1-4 Factory Five Roadster chassis. The bushing offset is .35" allow lowering the rack or moving it to one side a full .35". All positions in between will allow a combination of lowering the rack and centering the rack travel in the chassis. According to Mott College lowering the rack in addition to installing the FFR rack extenders further reduces bump steer. Fits all racks, manual and power. The one piece bushings insert from rear to clamp rack to the rear face of the front mounting ear. This makes the rack an integral frame member and adds to the stiffness of the front of the frame. The position is about 1/4" further forward than when installing the rack with two piece poly bushings. Material is as-machined 6061 aluminum. Made in USA. Requires two each 1/2" x 4" bolts and nuts and 1/2" washers supplied by FFR with the roadster kit. Note: We installed our power rack with the FFR tubular front lower arms installed in the inboard mounting holes, The upper arms on the bottom of the horizontal mounting plate and without rack extenders. This keeps the tires under the fender and results in minimal bump steer. This is on a Mk3 chassis with SN-95 Spindles and the SAI spindle adapter modification which makes the setup nearly equivalent to the Mk4.