The Carli-SPEC 2.0 IFP shocks are not your average shock for the Ram 3500, Carli takes it a step further. Carli has developed a tune that delivers all-around comfort and ride quality designed for on road, in town, highway, and towing/hauling. The Carli-SPEC 2.0 boast a 6063 aluminum construction offering a long service life and fantastic heat dissipation. They’re also anodized for corrosion resistance. The 5/8″ shafts are of hardened & chrome-plated steel. These shocks are spec’d with a premium 5WT oil to balance lubricity, consistent damping and the widest available range in temperature variation This shock package is designed to be matched with a set of Carli's 3" front coils and Carli add-a-packs or full progressive leafs.