Zone Offroad F121F Lift Kit — 6" Front / 4" Rear | Fox Adventure Front + Zone Rear Shocks | 2021–2026 Ford F-150 2WD Only | 4WD Does NOT Fit

Six inches of front lift. Four inches of rear block. Fox Adventure front shocks included.

The 2WD F-150 has no front differential or CV axles. Without the CV angle constraints that limit 4WD kits to 4 inches of front lift, the 2WD platform supports 6 inches with the correct 2WD-specific components. The F121F delivers that lift with Fox Adventure Series front shocks and Zone rear shocks — a step up from the Nitro front shocks on the F121N, same geometry throughout.

The Zone Offroad F121F pairs 6 inches of front lift with a 4-inch rear block spacer on the F-150's leaf-spring rear suspension. Heavy-duty 2WD-specific crossmembers and extended steering knuckles correct caster, camber, and scrub radius geometry at lifted height. Fox Adventure Series front shocks valved for the lifted 2WD geometry are included. Zone Offroad rear shocks are included. 2WD only — confirm your drivetrain before ordering.

⚠️ 4WD F-150 owners — this kit will not fit. Order F91F (Fox) or F91N (Nitro) for the 4WD platform.

Section 1 — Comprehensive Sizing Matrix

F121F vs the full 2WD F-150 lineup:

4-inch rear block — axle wrap note: At 4 inches of block height, axle wrap risk under hard acceleration or heavy towing increases compared to smaller block heights. Confirm with your installer whether an add-a-leaf is recommended for your towing or payload application before installation.

Kit contents:

• Heavy-duty front crossmembers (2WD-specific)
• Extended steering knuckles
• Strut spacers
• Differential drop brackets
• Fox Adventure Series front shocks
• Zone Offroad rear shocks
• 4-inch rear block spacer
• All required hardware

Section 2 — Critical Compatibility

✅ This kit fits — 2021–2026 F-150 2WD only

❌ This kit does NOT fit — read before ordering

4WD F-150 owners — stop here: The 2WD-specific components in this kit are not compatible with the 4WD platform. Order F91F for Fox shocks or F91N for Nitro shocks. Confirm your drivetrain on your door jamb or window sticker before ordering.

Raptor and Tremor owners: Factory long-travel and Tremor-specific suspension architectures are incompatible with this kit.

Section 3 — Before You Buy — Questions We Get Asked

Q: What's the difference between F121F and F121N?

One thing — the front shock package. Both kits use the same 2WD-specific heavy-duty crossmembers, extended knuckles, strut spacers, differential drop brackets, Zone rear shocks, and 4-inch rear block on the same 2021–2026 F-150 2WD platform at 6 inches of front lift. The F121F includes Fox Adventure Series front shocks with premium damping performance. The F121N includes Nitro gas front shocks at the lower price point. Same geometry. Same rear setup. Choose based on shock quality preference and budget.

Q: What's the difference between F121F and F90F?

Both include Fox Adventure Series shocks on the same 2021–2026 F-150 2WD platform at 6 inches of front lift. F121F pairs Fox front shocks with Zone rear shocks and a 4-inch block spacer — a specific 4-inch rear block height. F90F pairs Fox front shocks with Fox rear shocks and a matched rear lift — different rear lift profile and Fox shocks on both ends. If matched Fox shocks throughout matter more than a specific rear block height, F90F. If the Fox front with Zone rear at a 4-inch rear block is the right configuration, F121F.

Q: Should I add a leaf spring to the rear?

At 4 inches of rear block height, axle wrap risk under hard acceleration or heavy towing increases. Your installer can assess whether an add-a-leaf is warranted for your specific towing and payload use case. Confirm before installation rather than after.

Q: How does this ship?

This kit ships via LTL freight carrier at 205 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 F121F is for the 2021–2026 F-150 2WD owner who wants maximum front lift, a specific 4-inch rear block height, and Fox Adventure Series front shocks over the Nitro alternative. The 2WD-specific heavy-duty crossmembers and extended steering knuckles deliver correct caster, camber, and scrub radius geometry at 6 inches — the same geometry correction as the Nitro version, with Fox Adventure damping quality on the front end. The 4-inch rear block on the F-150's leaf-spring rear suspension provides the rear lift height. Zone rear shocks are included and matched to the rear block setup.

This kit is not for 4WD F-150 owners — the platform geometry is different and the components are not interchangeable, order F91F or F91N. It is not for 2020 or earlier F-150 owners. It is not for Raptor or Tremor owners. If Nitro front shocks at a lower price point are acceptable, order F121N. If matched Fox shocks front and rear with a different rear lift profile are preferred, see F90F. If a smaller rear block is the right call, order F122F. At 4 inches of rear block height, discuss add-a-leaf necessity with your installer before the job starts.

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.

2021–2026 Ford F-150 2WD only. 4WD does NOT fit — order F91F or F91N. Nitro front shocks instead — order F121N. Smaller rear block — order F122F.