Carli Add-A-Pack Rear Leaf Springs - 2017-23 Ford F250/F350 4×4 - 3in Lift
Can I pick up my order or have it installed at your shop?
Can I pick up my order or have it installed at your shop?
Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.
How do I know if this part fits my vehicle?
How do I know if this part fits my vehicle?
Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.
What if I need to return a product or it’s defective?
What if I need to return a product or it’s defective?
Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)
What's the lead time on custom or fabricated parts?
What's the lead time on custom or fabricated parts?
Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.
Description
Description
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:
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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 smoother ride quality
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Maintains OEM load capacity
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Includes 2" lift block for proper rear height
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Provides slightly rear-high stance with 4.5" and 5.5" lifts
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Includes bump stop drops, U-bolts, and hardware
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Improves traction and suspension control
Notes:
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Eliminates harsh rebound caused by factory overload spring
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Smooths spring engagement and improves ride predictability
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Rear may sit lower under heavy load but will ride better when loaded
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Not recommended for F-350 models due to stiff factory main leaf pack
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Full progressive leaf packs are recommended for optimal ride quality, especially on F-350
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Airbag systems 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-45-17
