The GKTECH solid subframe bushings are a direct replacement of the standard items and ensure that movement of the subframe is kept to a minimum. They eliminate axle tramp whilst also raising the subframe 0.59" (15mm) which helps to correct the roll center on lowered vehicles. - CNC Machined from 6061-T6 aluminum - 4 Piece Set 4 shims to adjust roll center Vehicle Compatibility: - Scion FR-S - Subaru ZC6 BRZ - Toyota ZN6 GT86