Overview
The Pro Comp EXPK4207M, also written K4207M, is a 4-inch Stage II suspension lift kit for the 2017–2022 Ford F-250 Super Duty and the 2017–2021 Ford F-350 Super Duty. It is a direct fit with a block and spacer at the rear and a 33-inch tire size.
The title names PRO-M shocks. The specifications list a 4-inch stage 2 kit with a lift height range of 4 to 5.5 inches, so the stage and the range describe the same kit.
Pro Comp describes its suspension systems as engineered for proper steering and suspension geometry, with maximum tire clearance for off-road use and attention to ride on pavement. The tire size listed is 33 inches.
Key features
- 4-inch Stage II lift with a lift height range of 4 to 5.5 inches
- PRO-M shocks, named in the title
- Block and U-bolt rear lift component
- Tire size listed at 33 inches
- Direct fit to the listed 2017–2022 F-250 and 2017–2021 F-350 Super Duty
Choosing a setup for Super Duty
Super Duty trucks carry heavy loads and towing work, so a lift of this type is often judged by how it handles added weight rather than by height alone. Pairing the suspension with suitable tires and checking the axle and driveline against the new geometry helps the truck keep its handling on the road and under load.
Owners who tow or haul often inspect parts at the same time as the lift. Worn leaf spring hardware, rear bushings and wheel bearings are common items to look at. A visual check of the shock mounts and brake hoses before each long trip is a simple habit that prevents later problems.
- Inspect rear bushings and hardware
- Check driveline angles after the install
- Confirm wheel bearing condition
Specifications
| Brand | Pro Comp Suspension |
|---|---|
| Part number | EXPK4207M (K4207M) |
| Kit type | Lift kit, suspension system |
| Kit stage | Stage 2 |
| Lift height | 4 inches; lift height range 4–5.5 inches |
| Tire size | 33 inches |
| Shock series | PRO-M |
| Rear lift method | Block and spacer |
| Rear lift component | Block and U-bolt |
| Fitment type | Direct fit |
Vehicle fitment
It fits the 2017–2022 Ford F-250 Super Duty in the King Ranch, Lariat, Limited, Platinum, XL and XLT trims, and the 2017–2021 Ford F-350 Super Duty in the same trim groups. Super Duty trucks from 2016 and earlier are not covered, and the 2022 F-350 falls outside the listed years. Confirm fit for your vehicle’s year, model and trim before ordering.
Super Duty trucks from 2016 and earlier are not on this list, and the 2022 F-350 is outside the listed F-350 years. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
A block-and-U-bolt rear and a 4-inch lift change the driveline and the pinion angle, so measure both after installation and have the front end aligned.
What’s included
The kit is sold with PRO-M shocks. Check the package contents against your installation before starting.
