Carli Add-A-Pack Rear Leaf Springs - 2017-23 Ford F250/F350 4×4 - 3in Lift

Carli Suspension

Carli 17-26 Ford F250/350 4X4 Progressive Add-A-Pack 3in Lift

The Carli Progressive Add-A-Pack is engineered to significantly improve rear suspension performance while maintaining factory load capacity on Super Duty trucks. Built in the USA by Deaver Spring Manufacturing, this proprietary 6-leaf progressive system replaces the harsh factory overload spring with a smoother, more controlled spring rate for improved ride quality and traction.

Designed specifically for use with 4.5" and 5.5" Carli lift systems, this kit includes a 2" rear block to achieve proper stance and balance. By eliminating the abrupt engagement of the factory overload leaf, the system delivers a more predictable and controlled ride both on and off-road, especially over medium to large bumps.

Key Features:

• Built in the USA by Deaver Leaf Spring

• Proprietary 6-leaf progressive spring design

• Replaces factory overload leaf for smoother ride quality

• Maintains OEM load capacity

• Includes 2" lift block for proper rear height

• Provides slightly rear-high stance with 4.5" and 5.5" lifts

• Includes bump stop drops, U-bolts, and hardware

• Improves traction and suspension control

Notes:

• Eliminates harsh rebound caused by factory overload spring

• Smooths spring engagement and improves ride predictability

• Rear may sit lower under heavy load but will ride better when loaded

• Not recommended for F-350 models due to stiff factory main leaf pack

• Full progressive leaf packs are recommended for optimal ride quality, especially on F-350

• Airbag systems recommended if maintaining load capacity is critical

• Long travel airbags recommended for 4.5"/5.5" systems

• Disconnect-style airbags recommended for 2.5"/3.5" systems to allow full suspension travel

Vehicle Fitment:

• 2017–2026 Ford F-250 Super Duty

• 2017–2026 Ford F-350 Super Duty

SKU: CS-FPAP-45-17