Rough Country M1 Suspension Lift Kits for 2017-2022 F-250 SUPER DUTY, F-350 SUPER DUTY - 55640

Name: Rough Country M1 Suspension Lift Kits
Brand: Rough Country
SKU: ROU-55640
Price: 1639.95 USD
Availability: InStock
Rating: 0 (0 reviews)

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Part Number: ROU-55640

$1,639.95

Rough Country M1 Suspension Lift Kits

Suspension Leveling & Lift Kits, Lift Kit, M1 Series, Coil Spring, Radius Arm, Leaf Spring Block, 6.00 in. Front, 6.00 in. Rear, Ford, Kit
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Rough Country M1 Suspension Lift Kits for 2017-2022 F-250 SUPER DUTY, F-350 SUPER DUTY - 55640

ROU-55640

Not Yet Reviewed

Part Number: ROU-55640

Estimated Ship Date: Nov 2, 2026

$1,639.95

Overview

Applications

Q&A

Instructions & Calculators

Estimated Ship Date: Nov 2, 2026 Would you rather pick it up?

Overview

Brand:

Rough Country

Manufacturer's Part Number:

55640

Part Type:

Suspension Leveling & Lift Kits

Product Line:

Rough Country M1 Suspension Lift Kits

Summit Racing Part Number:

ROU-55640

UPC:

840269917950

Front Lifted Amount Range (in):

6.00

Rear Lifted Amount Range (in):

6.00

Lift Style:

Suspension Lift Kit

Primary Front Lift Component:

Coil spring

Primary Rear Lift Component:

Leaf spring block

Max Tire Height (in):

37.00

Front Shocks/Struts Included:

Yes

Front Shock Quantity Per Wheel:

Front Shock Type:

Gas-charged adjustable monotube

Rear Shocks/Struts Included:

Yes

Rear Shock Quantity Per Wheel:

Rear Shock Type:

Gas-charged adjustable monotube

Brake Lines Included:

Hardware Included:

Yes

FMVSS 126 Certification:

Quantity:

Sold as a kit.

Notes:

Fits diesel models only. Fits models with 3.5 in. axle diameter only. Will not fit models with factory rear overload springs. Models equipped with a 10-speed transmission must remove dowel pin. Will not fit manual shift transfer case, or dually models. Will not fit models with Tremor factory trim package.

Rough Country M1 Suspension Lift Kits

Whether it's to turn heads, sling mud on a path less traveled, or simply to get extra clearance for those bigger tires, Rough Country M1 suspension lift kits offer amazing off-road performance at an incredible value. They are easy to install, and each kit includes the specific heavy-duty components and hardware needed for your truck's lift, plus Rough Country M1 shocks. Select the kit designed for your truck with the lift desired.

M1 shock features:

* 2 in. seamless extruded tube
* 46mm digressive piston
* Self-adjusting, deflective-disc independent rebound and compression
* 18mm centerless-ground, case-hardened, chromed, and super-polished rod
* 46mm monotube design ensures consistent, fade-free performance in all conditions
* Digressive valving instantly reacts to changing surface conditions
* Zinc plated for resistance against harsh elements
* Durable vulcanized natural rubber bushings