6 Inch Lift Kit | Diesel | M1 | Ford F-250/f-350 Super Duty 4wd (2008-2010)

Built for diesel Super Duty owners who want 6 inches of lift without sacrificing factory geometry — this kit pairs progressive-rate coil springs with radius arm drop brackets and a track bar relocation setup to maintain OE caster angles and steering response. You'll gain proper leveling front-to-rear and can run 35"–37" tires depending on your setup.

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

• 6-inch D-Coil springs — progressive-rate coils engineered to match OE spring rates for diesel powerplants, maintaining a smooth ride both on and off road.
• Add-A-Leaf — reinforces the rear leaf pack to carry the added height and load.
• 3-inch rear block and U-bolt kit — spaces the rear axle up while securing it securely to the frame.
• Radius arm drop brackets (pair) — preserve factory caster angles so your truck handles like it should, even after the lift.
• Track bar relocation bracket — re-centers the front axle and aligns the steering geometry with the drop pitman arm supplied in the kit.
• M1 Monotube shock absorbers (front and rear pairs) — application-valved shocks tuned for balanced on and off-road performance without harshness.
• Steering stabilizer relocation bracket — repositions the factory stabilizer; a single RC problem solver unit is recommended with larger rubber, dual stabilizer required for 37-inch tires.

Important notes

• Diesel models only — does NOT fit gas-powered F-250/F-350 Super Duty trucks.
• Does NOT fit dually models.
• If your vehicle is equipped with factory rear overload leafs, they must be removed before installation.
• Steering stabilizer upgrade — a Rough Country problem solver single unit is recommended with larger tires; dual stabilizer is required when running 37-inch tires.

Why customers pick this at Road Runner

• Corrected caster geometry after install — radius arm drops and track bar relocation keep your Super Duty handling tight and predictable, not wandering.
• Rough Country lifetime warranty backed locally — any defect on shocks, springs, or brackets is covered for life.
• Professionally installed by techs who do these lifts every week — your truck is in hands that know Super Duty suspension inside out.
• Alignment performed in-house as part of every lift install — we dial in toe and caster on our alignment rack so you drive home perfect.

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