The Carli Progressive Add‑A‑Pack + Block Kit is a high‑performance rear suspension upgrade engineered for 2019 and newer Dodge Ram 3500 4×4 trucks with the 4.25″ axle tube (non‑air‑assist models). This innovative kit replaces the stock rear lower overload leaf with a 5‑leaf progressive Add‑A‑Pack that enhances spring mobility, increases traction, and improves ride predictability both on‑road and off‑road. 

To achieve a 2″–2.5″ rear lift and match Carli’s 3″ front lift systems, the kit also includes a machined billet aluminum block, U‑bolts, and center pins for a complete install. This combination not only levels your truck’s stance but also gives a smoother, more controlled rear suspension response when loaded or traversing uneven terrain.