4 Inch Lift Kit | M1 Struts/m1 | Ford F-150 4wd (2015-2020)

Built for F-150 4WD owners who want a bolder stance, serious ground clearance, and trail-ready performance without sacrificing ride quality. This 4-inch suspension lift kit combines M1 Monotube struts with fabricated rear blocks and a reinforced crossmember to deliver both aggressive looks and geometry-correct suspension geometry. You'll fit 33–35 inch tires while retaining your factory track width and OEM wheel compatibility.

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

• Knuckles — Lifted knuckles provide proper suspension geometry and tire clearance for larger rubber without binding or excessive wear.
• RC Crossmember Box — Reinforced front crossmember designed specifically for the F-150 to handle the stress of added lift and off-road duty.
• M1 Loaded Strut Pair (4 Inch) — Nitrogen-charged M1 Monotube struts deliver superior damping, heat dissipation, and ride precision over long distances.
• 4 Inch Block & U-Bolt Kit — Heavy-duty fabricated rear blocks with anti-axle-wrap design to prevent wheel hop and preserve factory ride feel while stopping drivetrain bind.
• M1 Monotube Shock Pair — Premium rear shocks tuned for stability and control, working in tandem with the front struts for balanced suspension response.

Important notes

• This kit requires cutting and drilling — not a bolt-on application.
• Does NOT fit regular or standard cab models due to pinion angle issues, which cause drivetrain vibrations. Crew cab and SuperCrew models only.
• If you're keeping factory wheels, stay within 11.5 inch tire width to avoid trimming and ensure proper clearance.
• Works with 18-inch or larger factory wheels. Smaller factory wheels may require offset or backspacing adjustment.

Why customers pick this at Road Runner

• Professional installation by technicians who install Rough Country suspension kits every week — your truck gets the right geometry first time.
• Alignment performed in-house as part of every lift install, ensuring caster and camber are corrected and tire wear stays even.
• Rough Country Lifetime Warranty backed locally — any defect in materials or workmanship is covered, and Road Runner handles the claim for you.
• M1 Monotube shocks included — better heat dissipation and ride precision than N3 shocks, especially over rough terrain and at highway speeds.
• Anti-axle-wrap rear blocks preserve the factory ride feel while stopping wheel hop and drivetrain bind — you get lift without sacrifice.

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