4 Inch Lift Kit w/ Radius Arm | FOX 2.5 Performance Elite Coil-Over Conversion | Ford F250/F350 Super Duty (08-10) 4WD | Diesel

Built for diesel truck owners who demand 4 inches of lift without sacrificing on-road composure or off-road capability — this radius arm kit pairs FOX 2.5 Performance Elite coil-over shocks up front with a high-strength rear block to handle 35" tires while preserving your Super Duty's steering geometry and caster angles. Whether you're towing, hauling, or exploring, you get factory-friendly fitment and race-proven shock technology tuned right out of the box.

Installed and serviced at Road Runner Wheels & Tires. Most lift 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-specific 2.5-inch monotube shocks with remote reservoir, DSC adjusters (10 low-speed / 12 high-speed compression settings), and black anodized aluminum bodies for cooler operation under load.
• Heavy-Duty Tubular Radius Arms — Factory-location mounting with caster-correction geometry and OE-style rubber bushings for smooth, quiet, zero-maintenance travel.
• Forged Drop Pitman Arm & Track Bar Bracket — Minimizes steering angle and keeps your axle centered through suspension articulation, preserving tight steering response after the lift.
• Sway Bar Relocation & Brake Line Brackets — Engineered geometry keeps geometry square without binding.
• Secondary FOX 2.0 Shocks — Additional damping for stability during towing and payload work.

Out back

The rear uses a high-strength lift block paired with longer u-bolts and a set of FOX Performance shocks tuned for comfort and control. Choose between a block kit (with or without factory overload springs) or a leaf-spring package depending on your Super Duty's original setup and intended duty cycle.

Important notes

• Maximum tire clearance is 35 x 12.5 — staying within this size preserves driveshaft angles and transfer case geometry.
• Fits 2008–2010 F250 and F350 Super Duty 4WD models with diesel engines only. Not compatible with gasoline Super Duties or single-rear-wheel configurations.
• Caster correction geometry is pre-engineered into the radius arms and pitman arm — no field adjustments needed, and your truck will drive straight out of the lot.

Why customers pick this at Road Runner

• BDS warranty backed locally — if anything fails, we handle the claim and the fix, same-day when we can.
• Installed by technicians who do these kits every week on diesel Super Duties — no guesswork, no comebacks.
• FOX shocks come tuned and tested from the factory, so you're not burning time chasing compression settings.
• Drop pitman and track bar geometry keeps your steering tight and your axle centered — no wandering, no bump steer after the lift.
• Radius arm design lets you run caster correction for your exact ride height in a single setup — we dial it in for you.

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