4 Inch Lift Kit
M1 Struts/M1 · Ford F-150 4WD (2015-2020)
$1,709.95the kit
In stock at Rough Country · as of Sep 19
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Before you buy
Requires cutting and drilling. Does NOT fit regular or standard cab models due to pinion angle issues, which cause drivetrain vibrations. Models retaining factory wheels are advised to run no wider than a 11.5" wide tire.
About this kit
Transform Your F-150 with Rugged Style and Trail-Ready Performance: Give your Ford F-150 a bold new stance and unstoppable capability with Rough Country's 4-Inch Suspension Lift Kit. Designed for aggressive off-road performance and a head-turning look, this all-inclusive kit equips your truck for the path less traveled.
Highlights
- Boosted Ground Clearance: Sail over rocks, ruts, and road debris with extra ride height for unstoppable off-road confidence.
- Factory Track Width Retained: Keep the OEM stance you love while enjoying a taller, more capable setup.
- OEM Wheel Compatibility: Fits 18-inch or larger factory wheels so you can upgrade without buying new rims.
- Perfect Front-to-Rear Leveling: Eliminates that nose-down look, creating a balanced, aggressive profile.
- Heavy-Duty Fabricated Blocks: Welded steel blocks outlast cast alternatives, delivering unmatched strength and longevity.
- Anti-Axle-Wrap Rear Blocks: Special design preserves stock ride quality while stopping the wheel hop common with ordinary lift blocks.
- Fully Configurable with Shock/Strut Options: Choose from our nitrogen-charged N3's to the M1 Monotube's for the perfect ride quality.
Read the full description
Run Up to 33-Inch Tires with Confidence: Gain the clearance you need to conquer rough terrain. This kit includes durable lifted knuckles and strut spacers, providing room for larger tires while maintaining optimal geometry.
Engineered for a Factory-Like Ride: Precision-designed differential drop brackets, sway-bar brackets, brake line extensions, and a driveshaft spacer work together to maintain proper angles, ensuring a smooth, controlled ride, even with added lift.
Heavy-Duty Crossmembers Built to Last: Front and rear crossmembers are reinforced for maximum strength and feature a modern design tailored to fit newer F-150 models seamlessly.
Level Stance, OEM Compatibility: The system levels the front with the rear for a clean, aggressive profile, and retains the factory track width. Works with 18-inch or larger factory wheels* for hassle-free fitment.
Stronger, Longer-Lasting Rear Blocks: Fabricated rear blocks are engineered to outperform and outlast cast alternatives, delivering enhanced durability in demanding conditions.
Ride Quality You Control: Fully Configurable with Shock/Strut Options: Choose from nitrogen-charged N3 shocks for balanced performance, or upgrade to M1 Monotube shocks for enhanced ride precision and heat dissipation.
Built-In Anti-Axle Wrap Design: Specially designed rear blocks combat axle wrap and eliminate common lift block issues, all while preserving the factory ride feel.
Peace of Mind Included: Rough Country backs this kit with a Limited Lifetime Replacement Guarantee, ensuring your suspension is ready for whatever comes next.
What's in the box
- 1 × 4 Inch Block & U-Bolt Kit | Ford F-150 (09-20) Part #555BOX1
- 1 × Kit Box | Ford F-150 (15-20) Part #557BOX2
- 1 × RC Crossmember Box | Ford F-150 (15-20) Part #1555BOX4
- 1 × Knuckles | Ford F-150 (15-20) Ford Raptor (17-20) Part #1553BOX6
- 1 × M1 Loaded Strut Pair | 4 Inch | Ford F-150 4WD (2014-2026) Part #502051C
- 1 × M1 MONOTUBE SHOCK PAIR Part #770751P
Specifications
| Brand | Rough Country |
|---|---|
| Part number | 55540 |
| UPC | 840269941542 |
| Lift | 4″ |
| Shipping weight | 227 lb |
| Country of origin | China |
| Shipping | Ground shipping only · Arrives in more than one box |
Trucks it fits
| Truck | Years | Drive | Trims |
|---|---|---|---|
| Ford F-150 | 2015–2020 | 4WD | King Ranch, Lariat, Platinum, XL, XLT |
| Ford F-150 | 2016–2020 | 4WD | Limited, SSV |