KJ Metal Coil Springs

Metal coil springs can be added to any T-Springs (rubbers) for maximum rebound effect and for those who want to maximize energy. They are hooked into the holes provided on the T-springs. For safety purposes, make sure the hooks are facing down when the T-Springs are inserted into shells.
 
Note: If you have TS-XR6 T-Springs, upgrade to TS-Pro7 or TS-Pro6 prior to using Metal coil springs.