Skyjacker F8451K3 4-Inch Suspension Lift Kit with Front Coil Springs and Rear Blocks

The Skyjacker F8451K3 is a 4-inch suspension lift kit purpose-built for the F-350 Super Duty 4WD Diesel. Engineered with Skyjacker's 2-Stage Variable Rate Coil Springs, this kit delivers a smooth, controlled ride whether you're on the highway or pushing limits off-road — without sacrificing the factory-like feel you expect from a heavy-duty truck.

What's Included:

• 2-Stage Variable Rate Front Coil Springs
• Radius Arm Drop Brackets
• Track Bar Relocation Bracket
• Steering Stabilizer & Relocation Bracket
• Sway Bar End Links
• Front Brake Lines
• Bump Stop Spacers
• Rear Lift Blocks
• U-Bolts
• All necessary mounting hardware and detailed instructions

Key Features:

• 2-Stage Variable Rate Springs: The first flex rate stage allows the suspension to expand during full droop for maximum articulation; the second ride rate stage only engages under compression for a noticeably smoother on-road ride
• Radius Arm Drop Brackets: Lower the OEM radius arm mounts at the frame to maintain correct caster specifications and preserve proper alignment geometry
• Heavy-Duty Track Bar Relocation Bracket: Captures the front crossmember on both sides to prevent movement in this high-stress area and keep the axle centered
• Braided Stainless Steel Brake Lines: Reposition and correct brake line routing to accommodate the lift height
• Rear Block Kit: Designed to level models equipped with factory 1.875-inch rear blocks; note that models with the optional factory 3.875-inch rear block will have a higher rake angle
• Lift heights may vary depending on factory package options

Important Notes:

• Models equipped with a rear sway bar require Rear Sway Bar End Links PN[SBE404], sold separately
• Models with a Sterling rear axle require wider rear U-bolts PN[U9B16R] for kit or PN[U9B12R] for system, sold separately

The Skyjacker F8451K3 maintains factory geometry angles and alignment specifications while delivering added ground clearance and improved off-road capability. All structural components are powder-coated black for corrosion resistance, and the kit is backed by Skyjacker's limited lifetime warranty.