This 6" system is designed to lift your Ford Super Duty by replacing the front and rear leaf springs. 6" front & rear leaf springs provide room for 35” tires. This system use a custom progressive pack for ulitmate ride quaility, while providing 6" of lift. This system comes with a 1.75" bump stop spacer (not pictured) to prevent spring fatigue during the suspension cycle. This kit is ideal for Ford SuperDuty's with worn out leaf springs. This system is the ideal for all Super Duty’s.