7 Inch Lift Kit w/ Radius Arm | Ford F250/F350 Super Duty (20-22) 4WD | Diesel

Built for diesel Super Duty owners who want 7 inches of lift, room for 38" tires, and factory-compatible driveline geometry. This radius arm kit from BDS lifts your F-250 or F-350 with diesel-specific coil springs up front, a rear block, and all the brackets and driveline corrections needed to keep everything running true. You get caster adjustment built into the radius arms, transfer case indexing to preserve your factory front driveshaft angle, and your choice of NX2 Nitro or FOX Performance shocks.

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

• Pro-Ride diesel coil springs — engineered for the weight and stiffness of a Super Duty diesel, delivering 7 inches of lift with a smooth, planted ride.
• Heavy-duty tubular radius arms with caster correction — OE-style rubber bushings keep it quiet, and the adjustable geometry brings your caster into spec at full lift height.
• Forged drop pitman arm and track bar bracket — steering geometry stays correct without binding or excessive wear.
• Sway bar relocation, brake line brackets, and custom-tuned nitrogen shocks — everything needed for a complete, safe front end.

Out back

A high-strength fabricated lift block adds 6 inches of rear height, paired with longer u-bolts and brake line brackets to keep suspension and hydraulics in the right place. Matching NX2 Nitro or FOX shocks round out the rear, tying front and back together.

Pick your shocks

• NX2 Nitro Series — comfortable daily-driver feel with electronic damping and a smooth range that handles stock tires through 38" without harshness.
• FOX 2.0 Performance Series — firmer, more responsive tuning for mixed terrain and occasional towing; better control under load.
• FOX 2.5 Performance Elite — top-tier compression and rebound adjustability, best-in-class off-road capability and highway stability.

Important notes

• Transfer case indexing required: At 7 inches of lift, the factory front driveshaft angle becomes too steep. BDS supplies a precision indexing ring with ARP studs and a high-clearance transmission crossmember so you can clock the transfer case and maintain factory driveshaft compatibility.
• Max tire size: 38 × 13.5 without trimming or rub. Larger tires require additional clearance work.
• Radius arm caster adjustment: The tubular arms allow field adjustment to dial in caster; factory stamped arms do not.

Why customers pick this at Road Runner

• Installed by technicians who do BDS radius arm kits every week — the transfer case indexing and driveline geometry are done right the first time.
• BDS warranty backed locally; if anything fails, Road Runner handles the service.
• Diesel-specific spring tuning — not a one-size-fits-all kit.
• Corrected caster and steering geometry built in; your Super Duty tracks straight and the steering doesn't fight itself.
• Factory driveshaft preserved — no expensive conversion to a slip-yoke or two-piece shaft.
• Mount and balance available for most kits — minimal downtime.

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