These full-length progressive-rate spring packs, custom-built by Deaver Spring exclusively for Carli Suspension, are engineered with a two-stage design, aiming to maintain a “Light” 3/4-ton cargo weight capacity while providing a comfortable driving experience on all terrains. The progressive design of these leaf springs ensures that they offer balanced performance for on-road, off-road, and towing situations.. Whether you're using your vehicle as a daily driver or for weekend adventures, these progressive rate spring packs are designed to deliver optimal comfort and functionality while maintaining “Light” 3/4-ton cargo/tow capacity.. Carli Rear Leaf Spring Kit - 2010-13 Ram 2500/3500 - Diesel - 2in Lift. Carli Rear Leaf Spring Kit, 2010-13 Ram 2500/3500, Diesel, 2” Lift. Maintains slight rear-high stance with Carli 3-inch lift systems. Capable of 15 inches of suspension travel with factory shackle. Fits 2010-13 Ram 2500/3500, Diesel, 4x4 w/3.5-inch axle tube. Eliminates factory block; minimizes axle wrap/wheel hop. Delivers “Light” 3/4-ton cargo/tow capacity. Softens initial spring rate at ride height. leaf spring kit. CS-DFSP-10-D

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