Skyjacker D400CDKS4 4-Inch Cummins Diesel Suspension Lift Kit with Front and Rear Leaf Springs

The Skyjacker D400CDKS4 is a diesel-specific 4-inch suspension lift system engineered for Dodge W250 and W350 Cummins Diesel pickups. This complete lift kit replaces both the front and rear leaf springs and is built to restore and elevate your truck's suspension with improved ride quality, increased ground clearance, and enhanced off-road capability — without sacrificing everyday drivability.

At the core of this kit are Skyjacker's signature Softride® leaf springs, which are individually shot-peened with hard steel pellets at high velocity to increase tensile strength and extend service life. Tapered leaf construction distributes loads more evenly and promotes greater flex at the leaf ends, while Teflon® wear pads between each leaf — combined with bolt-style spring clips — prevent binding and eliminate interleaf friction for a smooth, quiet ride.

What's Included:

• Diesel-specific front Softride® leaf springs
• Rear Softride® leaf springs
• Polyurethane leaf spring eye bushings with replacement sleeves
• U-bolt kit (front and rear)

Key Features:

• 4-inch suspension lift for increased ride height and clearance
• Diesel-specific engineering for Cummins-powered applications
• Shot-peened Softride® springs for maximum strength and longevity
• Teflon® wear pads and bolt-style clips eliminate interleaf friction
• Tapered leaf design for improved load distribution and wheel travel
• Components powder coated black for corrosion resistance
• Comes with detailed installation instructions and all necessary mounting hardware
• Limited Lifetime Warranty

Additional Parts Required (sold separately):

• Pitman Arm — Part # DA20
• Adjustable Drag Link — Part # DL10
• Front Sway Bar Lowering Brackets — Part # SBL20 (vehicles equipped with front sway bar)
• Brake Lines — Part # FBL60 (front) and RBL60 (rear) recommended