Zone Offroad F113F Lift Kit — 6" Front / 3" Rear | Fox Adventure Shocks | 2017–2019 Ford F-250 / F-350 4WD | Gas Engine Only | 3-Leaf Main Spring Pack Only
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Before ordering, verify your vehicle details, current setup, and SKU with OFAS fitment support so your upgrade matches your build.
Shipping & Delivery
Free shipping is available within the lower 48 U.S. states. Large or heavy items may ship by freight, and delivery timing can vary by warehouse, carrier, and product availability.
Fitment, Shipping & Product Support
Two fitment gates. Both must be confirmed. Fox Adventure shocks included.
Before anything else — confirm your engine and count your rear leaf springs. The F113F fits the 2017–2019 F-250 and F-350 4WD with a gas engine and a 3-leaf main spring pack. Miss either gate and you're ordering the wrong kit.
The Zone Offroad F113F delivers 6 inches of front lift and 3 inches of rear lift on the 2017–2019 Super Duty IFS platform. Heavy-duty crossmembers and steering knuckles correct caster, camber, and scrub radius geometry at lifted height. The 3-leaf main spring pack provides sufficient rear load support at 3 inches of block height without requiring an add-a-leaf. Fox Adventure Series shocks valved for the lifted Super Duty geometry are included front and rear. Want Nitro shocks instead? Order F113N.
| Spec | Detail |
|---|---|
| SKU | F113F |
| Brand | Zone Offroad |
| Platform | 2017–2019 Ford F-250 / F-350 4WD — IFS platform |
| Front lift | 6 inches |
| Rear lift | 3 inches — block spacer only, no AAL required with 3-leaf pack |
| Shock type | Fox Adventure Series — front and rear, valved for lifted geometry |
| Engine | Gas only — does NOT fit 6.7L Powerstroke or any diesel |
| Spring pack | 3-leaf main spring pack ONLY — does not fit 2-leaf or 4-leaf |
| Rear suspension | Leaf spring with 3-inch block spacer |
| Drivetrain | 4WD only |
| Shipping weight | 193 lbs — LTL freight, residential delivery included |
| Nitro shock alternative | F113N — same kit, Nitro shocks at lower price point |
| 2-leaf spring pack alternative | F112F (Fox) / F112N (Nitro) — AAL + 4" rear block |
| Alignment required | Yes — full 4-wheel alignment mandatory post-installation |
| Re-torque required | Yes — all suspension fasteners after 500 miles of break-in |
| Install difficulty | Professional installation required |
Why the 3-leaf spring pack matters — and why you need to count before ordering: The F113F requires a 3-leaf main spring pack because the 3-leaf configuration is stiffer and provides sufficient axle wrap resistance at 3 inches of block height without an add-a-leaf. The 2-leaf main spring pack is not stiff enough to handle a 3-inch block without the additional support of an AAL — if you have a 2-leaf pack, order F112F instead, which includes the required AAL and a 4-inch rear block. Count the leaves in your main spring stack before ordering — do not guess.
F113F vs F112F — which spring pack do you have:
| Kit | Spring Pack | AAL | Rear Block | Rear Lift |
|---|---|---|---|---|
| F113F (this kit) | 3-leaf main | Not required | 3" | 3" |
| F112F | 2-leaf main | Required — included | 4" | 4" |
Kit contents:
- Heavy-duty front crossmembers
- Steering knuckles
- Strut spacers
- Differential drop brackets
- 3-inch rear block spacer
- Fox Adventure Series shocks — front and rear
- All required hardware
✅ This kit fits — two gates, both required
| Vehicle | Engine | Drivetrain | Spring Pack | Years |
|---|---|---|---|---|
| Ford F-250 Super Duty SRW | Gas only | 4WD | 3-leaf main | 2017–2019 |
| Ford F-350 Super Duty SRW | Gas only | 4WD | 3-leaf main | 2017–2019 |
❌ This kit does NOT fit — read before ordering
| Vehicle / Configuration | Reason | Correct Kit |
|---|---|---|
| F-250 / F-350 with 6.7L Powerstroke diesel | Gas engine only | — |
| F-250 / F-350 with 2-leaf main spring pack | Insufficient axle wrap resistance — AAL required | F112F (Fox) / F112N (Nitro) |
| F-250 / F-350 with 4-leaf or non-standard spring pack | Not confirmed — text us before ordering | — |
| F-250 / F-350 2WD / RWD | 4WD IFS platform only | — |
| 2016 and earlier Ford Super Duty | Different generation platform | — |
| 2020 and newer Ford Super Duty | Different generation platform | — |
| Ford F-350 DRW (Dually) | Confirm separately before ordering | — |
| Ford F-150 | Incompatible platform | — |
Engine: Gas engine only. The 6.7L Powerstroke diesel and all diesel configurations are not compatible. Check your door jamb sticker or window sticker for your engine code before ordering.
Spring pack: Count your rear leaf springs before ordering — do not guess. Three leaves in the main stack — this kit. Two leaves — order F112F. The 3-leaf pack's additional stiffness is what makes the 3-inch block without an AAL structurally sound on this platform.
⚠️ 2020+ Super Duty owners: The 2020 Super Duty is a different generation platform. This kit does not fit — text (469) 407-7538 with your year and we'll point you to the correct kit.
⚠️ F-350 DRW owners: Dually fitment requires separate confirmation. Text (469) 407-7538 with your year, engine, and spring pack before ordering.
Before You Buy — Questions We Get Asked
Q: What's the difference between F113F and F113N?
Same kit — same heavy-duty crossmembers, steering knuckles, strut spacers, differential drop brackets, and 3-inch rear block. Same 3-leaf spring pack requirement and gas-only engine restriction. The only difference is the shock package. F113F includes Fox Adventure Series shocks — premium damping and improved consistency across uneven terrain. F113N includes Nitro gas shocks at the lower price point. If Fox damping quality is the priority, F113F. If the geometry correction is the priority and budget matters, F113N.
Q: What's the difference between F113F and F112F?
Both cover the same 2017–2019 4WD gas platform at 6 inches of front lift with Fox Adventure shocks. The F113F is for trucks with a 3-leaf main spring pack — 3 inches of rear block, no AAL required. The F112F is for trucks with a 2-leaf main spring pack — it includes an add-a-leaf and a 4-inch rear block because the 2-leaf pack needs the additional spring support at that block height. Count your leaves before ordering.
Q: How do I count my rear leaf springs correctly?
Get under the rear of the truck and count the steel leaf springs in the main spring pack. Do not count any overload springs that sit above the main pack with a visible gap between them — count only the leaves in the main stack that are in full contact with each other. Two leaves in the main stack — order F112F. Three leaves — order F113F. If your count doesn't match either, text (469) 407-7538 with your year, trim, and any tow package codes before ordering.
Q: How does this ship and what do I need to know?
This kit ships via LTL freight carrier at 193 lbs. Residential delivery is included — the freight carrier will contact you to schedule a delivery window. Professional installation is required. Budget for a full 4-wheel alignment at the time of install and a re-torque appointment at 500 miles.
The Obsidian Take
The F113F is for the 2017–2019 Super Duty gas owner who has confirmed both fitment gates — gas engine and 3-leaf main spring pack — and wants the quality of Fox Adventure Series shocks alongside the geometry correction. Heavy-duty crossmembers and steering knuckles correct caster, camber, and scrub radius at 6 inches of front lift. The 3-leaf spring pack's stiffness means no add-a-leaf is needed at 3 inches of rear block height — the factory spring pack carries the load. Fox Adventure Series shocks valved specifically for the lifted Super Duty geometry deliver more consistent damping across uneven terrain than the Nitro alternative. One kit, one freight delivery, one professional installation session, Fox shocks.
This kit is not for diesel owners — gas engine only, confirmed before anything else. It is not for trucks with a 2-leaf main spring pack — the 3-inch block without an AAL is not structurally appropriate for the 2-leaf pack, order F112F. It is not for 2016 or earlier Super Duty owners. It is not for 2020 or newer Super Duty owners — different platform generation. F-350 DRW owners need to confirm separately. If Nitro shocks at a lower price point are acceptable, order F113N. Count your rear leaf springs before you check out — that's the gate that most people skip.
Product information is compiled from manufacturer-provided data. Obsidian Forged Auto Supply is not responsible for manufacturer-driven specification updates, metadata changes, or accuracy discrepancies in the foundational data sheets.
⚠️ LTL Freight Notice: This item ships via freight carrier due to size and weight. Residential delivery is included. Freight carrier will contact you to schedule delivery.
2017–2019 Ford F-250 / F-350 4WD. Gas engine only — diesel does not fit. 3-leaf main spring pack only — 2-leaf owners order F112F. Nitro shocks instead — order F113N.