The 5 leaf progressive add a pack rear springs replace the lower overload leaf on the factory leaf spring pack (1″ thick leaf that doesn’t follow the contour of the rest of the pack) with 5 thinner gauge leaf spring designed to maintain the factory load capacity while increasing mobility of the spring. Improved traction and predictability are immediately noticeable and as is a much-improved ride off-road and when loaded.

The 4″ lift provided by this pack matches to our 6″ front systems.

– Replaces lower overload spring
– More predictability and Spring Progression Keeps Tires Planted
– Includes 2″ Carli Block, Center Pins and U-Bolts
– 4″ lift matches to our 6″ front systems
– Fitment: 2003-13 Ram 2500 4×4, Diesel
– Fitment: 2003-Current 3500 4×4, Diesel
– Will NOT fit 2013+ 3500 with Factory Air-Assist