Full Progressive Deaver Heavy Duty Leaf Spring Packs

Features:

• Full progressive spring design for smoother ride
• Eliminates factory rear lift blocks
• Ideal for 1,000lbs constant bed load
• Heavy duty leaf packs for long-term durability
• Maintains 1" rear high stance with leveling
• Includes new U-bolts and bump stop drops
• Supports up to 37" tires with correct specs
• Optimized for 9" wide wheels with 5-5.5" backspacing
• Compatible with 2011–2016 F250/F350 4WD trucks
• Designed for trucks with 3.5" rear axle tubes

Built To Handle The Load Without Sacrificing Comfort

If you're hauling gear day in and day out, the Carli Full Progressive Deaver Heavy Duty Leaf Spring Packs are made with you in mind. These aren’t your average leaf springs, they’re purpose-built for trucks carrying a constant 1,000-pound load in the bed while still delivering a smooth and controlled ride. Say goodbye to harsh bumps and sagging rear ends, and hello to ride quality that actually improves with weight. These springs eliminate the need for factory blocks, cleaning up the rear suspension and dialing in the perfect stance when paired with Carli’s 2.5-inch leveling systems. You also get new U-bolts and rear bump stop drops right out of the box, so you're ready to install without hunting down extra parts. Whether you're towing equipment, hauling tools, or heading off-road with gear in tow, these springs give your Super Duty the support it needs without the stiff, jarring feel of stock setups. It's performance, strength, and comfort all working together.

Engineered For Load Balance And Long Term Stability

The Carli CS-FFSP-LVL-11-HD leaf spring packs are a full progressive spring system designed specifically for the 2011-2016 Ford F250 and F350 Powerstroke 4WD models with a 3.5-inch rear axle tube. Built by Deaver, these high-quality packs use a multi-stage spring rate that transitions smoothly under varying loads, offering better ride compliance compared to traditional overload leaf setups. The full spring replacement design eliminates the need for factory lift blocks, reducing axle wrap and improving suspension geometry under load. When matched with Carli’s 2.5-inch leveling systems, the springs maintain a 1-inch rear high stance, ideal for keeping your truck level with a full bed. The kit includes U-bolts and bump stop drops to ensure proper fit and bump zone engagement. These springs also allow for 37-inch tire clearance, provided wheel specs stay within the recommended 9-inch width and 5 to 5.5 inches of backspacing. This system is ideal for heavy-use work trucks or adventure rigs that carry weight full time and need suspension that can keep up.

Fits: 2011, 2012, 2013, 2014, 2015, 2016 Ford F250/F350 Powerstroke 4WD

Notes:

• Designed for trucks with a constant 1,000lb bed load.
• Eliminates factory rear lift blocks for improved performance.
• Provides 1" rear-high stance with 2.5" Carli leveling kits.
• Not ideal for unloaded daily driving due to firm ride.
• Includes U-bolts and rear bump stop drop brackets.
• Fits 2011–2016 Ford F250/F350 4WD with 3.5" axle tubes.
• Supports up to 37" tires with proper wheel specs.
• Requires wheels no wider than 9" with 5–5.5" backspacing.