GKTech - S13 240sx Solid rear subframe conversion bushings - subf-convThe GKTECH solid subframe conversion bushings are a direct replacement of the standard items and allow you to fit an S14 240sx S15 Silvia rear subframe in your S13 240sx, aswell as R33 R34 Skyline rear subframe in your R32 Skyline. The solid bushings also ensure that movement of the subframe is kept to a minimum. They eliminate axle tramp whilst also raising the subframe which helps to correct the roll center on lowered vehicles by raising the