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 Vehicle Compatibility: - Nissan 240sx - Nissan S13 Silvia - Nissan S14 240SX - Nissan S15 240SX - Nissan Skyline R32 GTS-T - Nissan Skyline R32 GTR (may require the use of shims, available separately CLICK HERE) - Nissan Skyline R32 GTS4 - Nissan Skyline R33 GTS-T - Nissan Skyline R33 GTS4 - Nissan Skyline R33 GTR (may require the use of shims, available separately CLICK HERE) - Nissan Skyline R34 GTT - Nissan Skyline R34 GTR (may require the use of shims, available separately CLICK HERE) - Nissan Cefiro A31 - Nissan 300ZX Z32