BDS 4 Inch Lift Kit w/ Radius Arm | FOX 2.5 PE Coil-Over Conversion | Ford F250/F350 Super Duty (2017-2019) 4WD Diesel | Leaf Springs w/ FOX 2.5 Performance Elite Rear

This variant uses a leaf spring rear lift option with a multi-leaf progressive design that maintains factory payload weight ratings, reduces axle wrap, and includes anti-friction pads for a smooth, quiet ride. Rear shocks are FOX 2.5 Performance Elite, featuring a 2.5-inch impact extruded aluminum body, a 7/8-inch hard chrome plated heat-treated alloy steel shaft, an external reservoir separating shock oil from high-pressure nitrogen, a standard DSC adjuster with 10 low-speed and 12 high-speed compression levels, a black anodized aluminum reservoir for increased cooling efficiency, and is fully serviceable. Includes a 1-year manufacturer's warranty.

Overview

This 4-inch radius arm lift kit with FOX 2.5 Performance Elite coil-over conversion is designed for 2017–2019 Ford F250 and F350 Super Duty diesel-powered trucks (4WD, SRW). The kit is built to improve stance, performance, and capability, providing clearance for up to 37-inch tires. Up front, the kit includes diesel-specific FOX 2.5 coil-over shocks, heavy-duty replacement radius arms, a forged drop pitman arm, a track bar bracket for steering correction, sway bar relocation, and brake line brackets. In the rear, the kit utilizes a high-strength fabricated lift block or leaf spring option (depending on variant), longer U-bolts, brake line brackets, and a matching set of FOX Performance rear shocks.

Features

• FOX 2.5 coil-over mounts in factory coil bucket location
• Adds additional secondary FOX 2.0 shock for maximum performance
• Eibach coil springs for smooth ride through rough terrain
• Heavy-duty tubular steel radius arms that correct caster while maximizing ground clearance
• Track bar relocation bracket and pitman arm maintain proper steering angles for improved handling
• Fabricated steel blocks provide a level stance from front to rear
• FOX shocks are fully serviceable and resistant to corrosion and harsh environments
• DSC (Dual Speed Compression) adjuster offers 10 separate low-speed and 12 high-speed compression levels
• Remote reservoir for additional fluid capacity to keep shocks running cool
• HD radius arms include caster adjustment and OE-style rubber bushing at the frame mount for smooth, quiet, service-free operation
• Clearance for up to 37-inch tires

Specifications

• Lift Height: 4 inches (front), 5 inches (rear block option)
• Fits: 2017–2019 Ford F250 / F350 Super Duty 4WD Diesel, SRW models only
• FOX 2.5 Performance Elite coil-over: 2.5-inch impact extruded aluminum body, 7/8-inch hard chrome plated heat-treated alloy steel shaft, external reservoir, DSC adjuster standard
• FOX 2.0 Performance Series shocks: 2-inch impact extruded aluminum body, IFP monotube design, CNC machined 6061-T6 aluminum mounting ends, 5/8-inch hard chrome plated heat-treated alloy steel shaft
• Radius arms: high-strength tubular steel, mount in factory location, include OE-style rubber bushing
• Rear block option compatible with 2 and 3 leaf main trucks
• Leaf spring option: multi-leaf progressive design, maintains factory payload weight ratings, includes anti-friction pads
• FOX shocks: 1-year manufacturer's warranty

Installation

• Estimated Time: 6–8 hours
• Difficulty: Moderate
• Special Tools Required: Cut-off Tool, Pitman Arm Puller

Important Notes

• If equipped with a 2-piece rear driveshaft, a Carrier Bearing Drop Kit may be required (BDS123402).
• 37 x 12.50 tires may require minor trimming.
• If your truck is equipped with a factory rear sway bar, add part number 123005.
• Fits SRW models only.
• Block kit option will fit both 2 and 3 leaf main trucks.