These Carli CS-FFSP-LVL-17 Full Progressive Rear Leaf Springs for the F250 / F350 are manufactured by Deaver Spring Mfg, in exclusive partnership with Carli Suspension. This innovative design offers a significantly more predictable and comfortable ride, with only a minor decrease in standard 3/4-ton load capacity. Unlike factory leaf spring packs, which typically feature 2-4 heavy main springs and an unyielding lower overload, our solution consists of a 9-Leaf main pack and a 3-Leaf overload, providing a more progressive spring rate. This results in a smoother unloaded ride, increased suspension travel, and impressive load-bearing capabilities as the rear end compresses, engaging all the springs.

The Carli Suspension Super Duty Full Spring Pack has been meticulously crafted to meet Carli's exacting standards, supporting a generous 15" of wheel travel. The relocation of the center pin allows for the accommodation of tires as large as 38 inches (with 37" being the recommended size), and it perfectly levels the rear to match our 2.5"/3.5" front suspension systems. This spring pack enhances suspension performance across the board, whether you're on the highway, tackling off-road terrain, or towing heavy loads.

Features & Benefits:

• Softens the initial spring rate at ride height
• Two-stage design for a balance of weight capacity and comfort
• Deaver Spring Mfg partners exclusively with Carli Suspension
• Includes: driver and passenger rear leaf springs along with ubolts with hardware
• Suitable for Daily Drivers and Weekend Warriors, perfect for work and play
• Provides a 1-inch rear lift, maintaining a slight high rear stance with Carli 3-inch Systems
• Minimizes issues like axle wrap and wheel hop
• Limits payload to a "light" 3/4-ton capacity (full capacity attainable with Carli Long Travel Air Bags - sold separately)
• Capable of accommodating up to 15 inches of suspension travel