The GKTECH solid subframe conversion bushes are a direct replacement of the standard items and allow you to fit an S14/S15 rear subframe in your S13/180sx, aswell as R33/R34 rear subframe in your R32. The solid bushes also ensure that movement of the subframe is kept to a minimum. They eliminate axle tramp whilst also raising the subframe 15mm which helps to correct the roll center on lowered vehicles. - CNC Machined from 6061-T6 aluminiumWant more technical information on the subframe conversion, differences between S13 and S14 subframes and a look into the design process? Click here: https://au.gktech.com/news/s-chassis-rear-subframe-comparison/ Vehicle Compatibility: - Nissan 180sx - Nissan S13 Silvia - Nissan Skyline R32 GTS-T (2WD) - Nissan Cefiro A31