Carli CS-FPAP-11 Progressive Add-a-Pack Deaver Leaf Springs | 2011-2016 Ford F250/F350

Features:

• Designed for 2011–2016 F250 and F350
• Built by Deaver Spring MFG for Carli
• Six-leaf progressive add-a-pack design
• Replaces factory overload leaf spring
• Improves ride quality on rough roads
• Reduces harshness in freeway driving
• Maintains original load carrying capacity
• Provides better rear suspension articulation
• Ideal for daily drivers and weekend haulers
• Custom-tuned for Carli Suspension systems
• Enhances control with minimal sag under load
• Made in the USA with high-quality materials

Smooth Out Every Mile Without Giving Up Strength

If you're tired of feeling every crack and bump in the road, the Carli CS-FPAP-11 Progressive Add-a-Pack is a game-changer for your 2011–2016 Ford F250 or F350. Designed to drastically improve ride comfort without sacrificing load capacity, this kit is perfect for drivers who use their truck every day but still need it to handle the heavy stuff when it counts. Instead of the factory overload leaf that delivers a stiff, jarring ride, Carli swaps in six thinner Deaver-manufactured leaves that offer progressive support and a smoother feel. It’s the kind of upgrade that transforms your truck’s rear end without having to commit to a full spring pack. Whether you're commuting, towing, or just enjoying a weekend cruise, you'll feel the difference in how your suspension reacts. It’s subtle in the best way, keeping things level under load, yet much more forgiving when unloaded. If you’re running a Carli Suspension system or just want to dial in a better ride, this Add-a-Pack is a smart investment that balances comfort with capability.

Engineered To Perform With A Progressive Suspension Upgrade

The Carli CS-FPAP-11 Progressive Add-a-Pack features a proprietary design built in partnership with Deaver Spring MFG, tailored specifically for the 2011–2016 Ford Super Duty platform. It replaces the factory lower overload spring with a pack of six thinner gauge leafs, creating a progressive spring rate that reacts more naturally to road conditions. This setup allows the rear suspension to absorb bumps and road chatter more effectively, especially at highway speeds where factory springs can feel rigid and unrefined. What’s impressive is that this improved ride quality doesn’t come at the cost of load handling, Carli has designed the pack to retain the truck’s OEM payload capacity. The increased articulation also benefits off-road handling and towing stability by keeping the tires planted and suspension movement smooth. The leafs are designed to integrate cleanly with Carli Suspension systems but will also benefit trucks running other high-quality lift kits. Built in the USA with premium materials and tight tolerances, these springs are meant to last and perform. For a rear suspension upgrade that improves comfort without compromise, this Add-a-Pack delivers exactly what discerning truck owners are looking for.

Fits: 2011, 2012, 2013, 2014, 2015, 2016 Ford F250/F350

Notes:

• Designed for 2011–2016 Ford F250 and F350 models
• Maintains factory load carrying capacity
• Replaces factory overload spring with six progressive leafs
• Engineered to improve ride comfort without major lift
• Ideal for use with Carli Suspension systems
• Will not significantly increase rear ride height
• Not intended for use with airbags or overload helpers
• Improves rear suspension response over rough terrain
• Professional installation is recommended for best results
• Designed and manufactured in the USA