05-07 FORD F250/F350 PROGRESSIVE ADD-A-PACK
Couldn't load pickup availability
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?
Yes! We offer local pickup on most products and professional installation at our shop at 25 Town and Country Drive, Washington, MO. 63390. Contact us at 636-429-7020 to schedule a time to come in.
How do I know if this part fits my vehicle?
How do I know if this part fits my vehicle?
If no fitment info is listed, contact us at 636-429-7020 with your vehicle’s year, make, and model — we’ll help you find the right part.
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 items can be returned within 30 days if unused and in original packaging. Many products also include a manufacturer warranty. Contact us at 636-429-7020 for assistance.
How can I track my order?
How can I track my order?
Once your order ships, you’ll get a tracking number via email to monitor your shipment.
05-07 FORD F250/F350 PROGRESSIVE ADD-A-PACK
Description
Description
Our Add-a-Pack rear springs are a proprietary design built for us by Deaver Spring MFG. The lower overload leaf is removed and 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, 7C3Z-5598-K
These packs are designed to eliminate the incredibly harsh rebound of the factory overload spring they replace, helping to tame 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 — 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 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.
