2017-2026 Superduty 4x4 XHD Progressive Leaf Spring Kit 1" Lift (CS-FFSP-LVL-17-XHD)

For the Super Duty that defines "Extra Heavy Duty," the Carli XHD Full Progressive Leaf Spring Pack is the ultimate solution for carrying constant, massive loads without punishing the driver. Engineered specifically for trucks with a constant bed load of 2,000lbs or more, this system replaces the entire jarring factory leaf spring and block assembly with a robust, full progressive pack. This design provides an incredibly supple ride while effortlessly managing extreme payloads, delivering unparalleled comfort and control for the most demanding workhorses.

Part Number: CS-FFSP-LVL-17-XHD

Features

• Specifically designed for trucks with a constant 2,000lb+ bed load (service bodies, pop-up campers, etc.).
• Provides 1" of rear lift on an F-250 with the constant load.
• Full progressive design provides the best possible ride quality for a truck that is always heavily loaded.
• Replaces the entire factory leaf spring pack, eliminating the harsh factory block and overloads.
• Includes new U-Bolts and rear bump stop drops. 37" tire fitment.

From Carli Suspension

As the “Overland” Market has grown, and with it, the different in-bed camper segments, we’ve found ourselves adapting. The “HD” spring can be pushed from it’s recommended 1,000lbs. but not by much. Plus, if you’re spending that kind of money on a custom spring pack, why settle for “almost” correct? We started with the TFL Truck. If you’re unfamiliar with them, The Fast Lane Truck is a popular YouTube truck-testing channel. We participated in the build of their 2020 F250 they equipped for their “No Pavement Needed” series in which they took a Carli Pintop equipped Super Duty across the country with a 4 Wheel Camper Hawk pop-up in the bed supported by our “XHD” leaf spring pack.

The constant 1,800lb.-2,000lb bedload required us to build a beefier version of the HD leaf springs. With this leaf spring and the added spring rate, we require customers to run the Pintop (King 2.5″) shock package for which we’ve developed a custom shock tune refining the overall ride, handling, spring rates and heightened center of gravity that accompany a rig modified as such. The result can be seen in the MANY videos TFL published featuring this bad-ass rig.

Availability on these, you’ll want to reach out to your Carli Retailer – be aware, they may not even know they exist. That said, you can expect a custom order to be in the 2-3 month range which matches a normal (non-COVID) lead time on the matching, custom tuned King Shocks to accompany them.