BDS 4 Inch 4-Link Lift Kit | FOX 2.5 Performance Elite Coilover Conversion | 2020-2022 Ford F-450 Super Duty 4WD | Rear FOX 2.5 Performance Elite

Rear shocks configured with FOX 2.5 Performance Elite shocks. These 2.5-inch impact extruded aluminum body shocks feature a massive 7/8-inch hard chrome plated heat-treated alloy steel shaft, an external reservoir to separate shock oil from high-pressure nitrogen, and a DSC (Dual Speed Compression Adjuster) offering 10 separate low-speed and 12 high-speed compression levels for precise, on-the-fly tuning. Fully serviceable with a 1-year Manufacturer's Warranty.

Overview

The BDS 4-inch 4-Link Lift Kit is engineered for the 2020–2022 Ford F-450 Super Duty 4WD, delivering improved strength, stability, and ride quality whether towing, hauling, or exploring off-road. This system replaces the factory radius arms with a heavy-duty 4-link setup that improves axle control, reduces binding, and delivers smoother suspension movement throughout the entire range of travel. The 4-link design provides more consistent caster angles, enhanced articulation, and improved tracking under acceleration and braking — particularly beneficial on larger Super Duty platforms like the F-450. Front FOX 2.5 Performance Elite coilovers are included for exceptional responsiveness, control, and damping consistency. Steering geometry is corrected via a forged drop pitman arm and a heavy-duty track bar drop bracket to keep components in phase through suspension travel while recentering the front axle.

Features

• BDS 4-Link suspension conversion replaces factory stamped steel radius arms for optimized suspension geometry
• High-strength 1/4-inch steel brackets allow mounting of HD upper and lower control arms to correct axle positioning
• Holds caster angle through the full range of wheel travel, limiting caster change
• Improved ride quality and superior axle articulation compared to radius-arm designs
• Better suspension geometry prevents anti-dive under braking for a more planted feel
• Front FOX 2.5 Performance Elite coilovers with remote reservoir included
• BDS forged drop pitman arm maximizes steering radius at 4 inches of lift
• Heavy-duty track bar drop bracket keeps steering geometry in phase through suspension travel
• Choice of FOX 2.5 Performance Series HTO or FOX 2.5 Performance Elite shocks for the rear

Installation

• Estimated Installation Time: 8–10 hours
• Difficulty: Difficult

Important Notes

These kits are designed for the F-450 style front end. They do not work with the standard Ford Super Duty F-250/350 axle width.