Carli CS-FPAP-LVL-17 Deaver Leaf Springs Add-A-Packs 1 inch Lift | 2017-2025 Ford F250/F350 Super Duty Powerstroke 4WD

Features:

• Provides 1/2 to 1 inch rear lift
• Replaces harsh factory overload spring
• Maintains full factory load capacity
• Improves ride quality over medium bumps
• Eliminates factory rear block
• Pairs perfectly with Carli leveling kits
• Includes bump stop drops and U-bolts
• Progressive-rate design for smoother travel
• Built in the USA by Deaver Spring
• Reduces harsh rebound under load
• Direct bolt-on for 2017–2025 Super Duty

Smooth Out The Rear Without Giving Up Payload

If your Super Duty feels stiff and punishing every time you hit a bump unloaded, the Carli Add-A-Pack might be exactly what your truck needs. Built in partnership with Deaver Spring, this system replaces the factory overload leaf with a smoother, six-leaf progressive design that tames harsh rebound and gives your truck a more controlled, comfortable ride. Whether you’re daily driving, running trails, or occasionally hauling, it softens the big hits without compromising the work-ready feel of your truck. You still get full OE load capacity, so you don’t have to trade function for comfort. When paired with Carli’s leveling systems, this kit gives you up to 1 inch of rear lift for a balanced stance that looks as good as it performs. It even eliminates the bulky factory block, which helps clean up your rear suspension geometry. With everything included for install and no weird compromises, this is a smart, well-rounded upgrade that makes your truck more enjoyable to drive every day.

Progressive Spring Rate That Controls Rebound And Load

The Carli CS-FPAP-LVL-17 Add-A-Pack was engineered to solve a specific problem: the jarring rebound created by the stock overload leaf on Ford’s 2017–2025 Super Duty trucks. Instead of relying on a single thick overload, this setup uses six thinner, progressively stacked leafs to better absorb and control suspension movement under a range of conditions. The design smooths out sharp impacts while still preserving factory towing and payload ratings, making it ideal for mixed-use trucks. It provides between 0.5 and 1 inch of rear lift depending on the truck’s configuration and is intended to pair seamlessly with Carli’s front leveling coils. The system also comes with bump stop drops, U-bolts, and all necessary hardware for a complete bolt-on install. By removing the OE block, it improves suspension cycling and helps reduce axle wrap. Every pack is made in the USA by Deaver Spring, ensuring consistent quality, proper fitment, and performance that lasts.

Fits: 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 Ford F250/F350 Super Duty Powerstroke 4WD

Notes:

• Designed for 2017–2025 Ford F250/F350 Super Duty 4WD
• Provides approximately 0.5 to 1 inch of rear lift
• Pairs best with Carli front leveling coils
• Replaces harsh factory overload spring for smoother ride
• Maintains factory payload and towing capacity
• Progressive 6-leaf design improves suspension response
• Ideal for trucks used daily with occasional towing or off-road use
• Not designed for constant 1,000 lb bed loads, use HD spring option if needed
• Eliminates the factory rear block for cleaner suspension geometry
• Includes U-bolts, bump stop drops, and install hardware
• Manufactured in the USA by Deaver Spring for Carli
• Provides a noticeable improvement in ride quality without major modifications