6 Inch Lift Kit | Rear Blocks | M1 | Ford F-250/f-350 Super Duty 4wd (1999)

Built for 1999 Ford F-250/F-350 Super Duty 4WD owners who want level stance and maximum ground clearance, this 6-inch rear lift kit combines factory-matched leaf springs with application-tuned M1 monotube shocks to lift the rear while leveling the front-to-rear geometry. Supports 35"–37" tires and restores proper driveline angles after the lift is installed.

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 factory leaf springs (pair) — engineered for the 1999 Ford Super Duty to deliver rated lift height and maintain load-carrying capacity.
• M1 monotube shock absorbers (pair) — application-valved for balanced on and off-road performance, tuned to work with the new spring rate.
• Lift block kit (pair, 4-inch) — stacked under the rear axle to add lift height and angle correction.
• Pitman arm — Ford Bronco/F-250/F-350 Super Duty 4WD–specific geometry restoration component.
• Universal U-bolt kit — secures the blocks and springs to the axle.

Important notes

• Does NOT fit V-8 gas engine models.
• Does NOT fit dually models.
• Does NOT fit vehicles with a production date on or after March 1, 1999.
• A carrier bearing drop bracket (#1197) is required for trucks equipped with a 2-piece rear driveshaft.

Why customers pick this at Road Runner

• Professional alignment performed in-house as part of every lift install — no separate trip needed.
• Rough Country lifetime warranty backed locally by our team.
• Installed by technicians who do these kits every week and know the common pitfalls.
• We verify fitment against your truck's build date and engine before you buy — no surprises at install time.

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