UMI’s new F-150 product line features a well developed coilover lowering system designed for both performance and a comfortable ride. 2WD trucks utilize a 600 lb/in front spring set while 4WD trucks receive 850 lb/in coils. The stance is just right and the performance is something to experience for sure. Viking shocks feature 361 possible valving combinations, making for a versatile and tuneable driving experience.