These are the same springs we use in our ND Fox Sport setup, but only the springs. These assume you already have a complete ND Fox setup and only need the springs. 400 lb/in front, 225 lb/in rear for the ST (soft top) and 250 lb/in rear for the RF. We don't sell the rear springs by themselves, but you can find them most places that sell 12" long, 2.5" diameter springs. 

Note that the color of the main springs has changed to blue and we no longer have red ones.