Description
Carli Suspension
Carli 17-26 Ford F250/350 4X4 Progressive Add-A-Pack 1in Lift
The Carli Progressive Add-A-Pack is a premium rear suspension upgrade designed to improve ride quality and rear spring performance on Super Duty trucks while maintaining factory load capacity. Built in the USA by Deaver Spring Manufacturing, this proprietary 6-leaf progressive pack replaces the harsh factory overload leaf with a smoother, more predictable spring rate.
By eliminating the abrupt engagement of the factory overload spring, this system dramatically improves ride comfort, traction, and control over medium to large bumps. The progressive design ensures smoother engagement and disengagement of the spring, making it an ideal pairing with Carli leveling systems while maintaining the truck’s intended load handling capability.
Key Features:
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Built in the USA by Deaver Leaf Spring
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Proprietary 6-leaf progressive spring design
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Replaces factory overload leaf for improved ride quality
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Maintains OEM load capacity
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Provides approximately 1/2″–1″ rear lift
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Eliminates harsh rebound from factory overload spring
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Includes bump stop drops, U-bolts, and installation hardware
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Designed to pair with Carli leveling systems
Notes:
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Eliminates the factory overload leaf and replaces it with thinner progressive leaves
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Improves ride quality and traction by smoothing spring engagement
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Rear may sit lower under heavy load but will ride significantly better
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Not recommended for F-350 models due to stiffer factory main leaf pack
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For best ride quality, full replacement progressive leaf packs are recommended, especially for F-350
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Airbag systems are recommended if maintaining load capacity is critical
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Long travel airbags recommended for 4.5″/5.5″ systems
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Disconnect-style airbags recommended for 2.5″/3.5″ systems to allow full suspension travel
Vehicle Fitment:
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2017–2026 Ford F-250 Super Duty
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2017–2026 Ford F-350 Super Duty
SKU: CS-FPAP-LVL-17
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