6 Inch Lift Kit | Diesel | Radius Arm | M1 | Ford F-250 Super Duty 4wd (15-16)

Built for Ford F-250 diesel owners who want a commanding 6-inch lift without sacrificing ride quality or geometry, this Rough Country Radius Arm Lift Kit adds aggressive ground clearance while preserving the truck's factory suspension angles. With 35"–37" tire clearance and adjustable caster correction at the axle, you get the look and capability of a modern lifted Super Duty that still handles everyday driving with balance and composure.

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

What's included

• Heavy-duty radius arms — precision-fit to factory mounts with durable rubber bushings for vibration absorption and maintained suspension geometry.
• Block U-bolts — specialized rear overload hardware designed to eliminate axle wrap while maintaining stock ride quality.
• 6-inch D-coil springs — fabricated for strength and durability with a longer service life than cast alternatives.
• Pair of N3 monotube shock absorbers — valved for balanced on- and off-road performance with superior damping control.
• Adjustable alignment cam — allows caster correction at the axle to dial in perfect suspension geometry post-install.
• Track bar relocation bracket and drop pitman arm — maintain proper steering and suspension alignment under the new ride height.
• Brake line relocation brackets — ensure clearance and safety with the lifted suspension.

Important notes

• This kit fits 2015–2016 F-250 Super Duty diesel 4WD models only — does not fit F-350, dually, or gas-engine variants.
• Requires models equipped with rear factory contact overload springs; confirm your truck's original spec before ordering.

Why customers pick this at Road Runner

• Caster-correcting radius arms preserve factory suspension geometry — no binding, no accelerated wear.
• Rough Country Lifetime Replacement Warranty backed by local service and expertise.
• 100% bolt-on design means faster installation and zero cutting or drilling.
• In-house alignment performed as part of every lift install — suspension dialed in to spec the same day.
• Technicians install these kits every week — not a one-off job, but proven routine work.

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