Carli Ford Super Duty 05-16 Progressive Add-A-Pack

CS-FPAP-05

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Regular price $545.00 Save $-545.00

-51 in stock

Carli's 6 leaf progressive add a pack rear springs are a proprietary design built for them by Deaver Spring MFG. The lower overload leaf is removed and is replaced with 6 thinner gauge leafs. The O.E.M. load capacity is still maintained while improved ride is achieved. The add-a-packs will help to take the harshness out of hard impacts that would normally hit a wall deeper in the travel of the stock leaf packs. This is sold as a spring pair. 

Our Add-a-Pack rear springs are a proprietary design built for us by Deaver Spring MFG. The lower overload leaf is removed and is replaced with thinner gauge leaves. The O.E.M. load capacity is maintained while improved ride is achieved.


If Pairing to 4.5″ System: Super Duties equipped with a 2″ tall block from the factory will require the factory 3-5/8″ tall Block to achieve a leveled stance to a 4.5″ kit with the Add-a-Pack.
Factory Block Part Number: 7C3Z-5598-HB, 7C3Z-5598-JB

If Pairing to 2.5″ System: Super Duties equipped with a 3-5/8″ tall block from the factory will require the factory 2″ tall Block to achieve a leveled stance to a 2.5″ kit with the Add-a-Pack.
Factory Block Part Number: 7C3Z-5598-L and 7C3Z-5598-K

These packs are designed to eliminate the incredibly harsh rebound of the factory overload spring they replace helping to tame the medium to large bumps when paired with a Carli Suspension System. The Progressive add-a-pack replaces the lower overload springs on the factory pack. This is the 1″ thick leaf that doesn’t follow the contour of the rest of the pack. In removing this spring “wall” and replacing it with a mini progressive leaf pack, the capacity of the truck remains unchanged, as it’s determined by the factory springs, while the progression of the rear spring rate becomes substantially more predictable. The engagement and disengagement of the spring becomes quite a bit smoother increasing both ride quality and traction. As the “wall” was removed, the rear may sit lower with a heavy load BUT it will ride better loaded.

The rear of the Super Duty can be outfitted with a replacement Full Progressive Spring Pack (reduces capacity to a “light” ¾-ton) or this factory leaf-pack modifying Progressive Add-a-Pack. This is where the F250 and F350 are a bit different. Since 2008, the main spring packs on these two trucks is different; the F250 has a lighter rate spring pack than its 350 counterpart. The F250 Add-a-Pack equipped systems are a nice improvement over stock; the F350 with the Add-a-Pack is still very stiff (in some cases, more so than stock) in the rear as the main pack doesn’t move much unless loaded. For this reason, we DO NOT recommend these be installed on an F350.

For optimal ride quality, we recommend the Full Replacement Leaf Spring packs for both trucks but especially the F350 given the super-stiff factory springs. If capacity is a concern, an aftermarket airbag system should be installed to compliment the Full Progressive Leaf Springs to restore the F350 capacity. In the 4.5″/5.5″ Range, we offer our Long Travel Airbags. If 2.5″/3.5″ height, we recommend a system that will allow the airbags to disconnect from the lower mount during suspension cycling to ensure you’re able to take advantage of all your rear suspension travel.


SPECIFICATIONS

-Built in the U.S.A.
-Smooth progressive design
-Supplied with U-bolts and hardware
-Provides 2.0" of lift

Installation Instructions

Customer Reviews

Based on 3 reviews
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J
Joshua Hamel
Devear AAP

These is the 05-16 add a pack. I installed them on a 2022 FX4. I replaced the factory 2" block and 1" overload spring. The resulted in a net zero lift and tremendously improved ride quality. No apparent loss in load capacity either.

Worth every penny

M
Matt Stoner
Worth every penny!!

If you’re on the fence spend the extra money. My 16 year old truck drives like brand new one.

G
Gary Miller
Good quality straight forward instructions, better rife

Fast shipping well packaged, good instructions much better ride over stock