4 Inch Lift Kit w/ Radius Arm | FOX 2.5 Performance Elite Coil-Over Conversion | Ford F250/F350 Super Duty (05-07) 4WD | Diesel

Built for diesel Super Duty owners who demand 4 inches of lift without sacrificing ride quality, this radius arm kit pairs FOX 2.5 Performance Elite coil-overs up front with a solid rear block setup — giving you up to 35" tire clearance and corrected caster geometry that keeps your truck handling right.

Installed and serviced at Road Runner Wheels & Tires. Most kits go in the same day. Call (678) 400-6467 to schedule.

What you get up front

• FOX 2.5 Performance Elite Coil-Over Shocks — Diesel-tuned 2.5-inch shocks with remote reservoir for cooling, DSC dual-speed adjusters (10 low-speed, 12 high-speed compression levels), and race-proven technology straight out of the box.
• HD Tubular Radius Arms — High-strength drop-in replacements with caster correction built in and OE-style rubber bushings for smooth, quiet operation across all lift heights.
• Forged Drop Pitman Arm & Track Bar Bracket — Corrects steering geometry after the lift, keeps front axle centered through suspension travel, and minimizes steering angle.
• Secondary FOX 2.0 Shocks, Sway Bar Relocation & Brake Line Brackets — Complete front-end support package engineered for the extra weight and demands of a diesel engine.

Out back

A high-strength lift block, longer u-bolts, and a matching set of FOX Performance shocks handle rear-axle geometry and ride quality. Choose between a block kit (with or without factory overload) or a leaf spring setup — both deliver the same solid 3–4 inches of rear height.

Important notes

• Maximum tire size is 35 x 12.5. Tire pressure and rim backspacing affect final clearance — verify with your wheel and tire choice at purchase.
• This kit is designed for 2005–2007 Ford F250 and F350 Super Duty 4WD diesels only. Factory air suspension and RamBox configurations are not compatible with this lift.
• Driveshaft angles and transfer case indexing may require minor re-evaluation after install depending on final ride height and aftermarket driveline components.

Why customers pick this at Road Runner

• BDS warranty backed locally — our technicians install these kits every week and know every bolt, bushing, and adjustment by heart.
• Caster correction built in — no guessing on geometry; the radius arms and pitman arm do the work for you.
• FOX coil-overs tuned for diesel weight — not a one-size-fits-all shock, but engineered for the F250/F350 diesel platform.
• Dual-speed DSC adjusters let you dial in comfort for daily driving or lock in stiffness for towing and rough terrain.
• Mount and balance available on most trucks — we stock these kits and turn them around fast.

Ready to build it? Call (678) 400-6467. Hablamos Español.