{"product_id":"zone-off-road-4-inch-lift-kit-zonf91n-strut-spacer-nitro-ford-f150-2021-2026","title":"Zone Off Road 4\" Lift Kit — Ford F-150 4WD (Strut Spacer \/ Nitro Series Rear Shocks, 3\" Rear Block) SKU: ZONF91N","description":"\u003ch4 dir=\"ltr\"\u003eOverview\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eThis is Zone Off Road's 4\" lift kit for the Ford F-150, 4WD, configured with OE strut spacers up front (retaining the factory front struts) and Zone Nitro Series rear shocks, paired with a 3\" rear block kit. The system is built around USA-made, precision-engineered steering knuckles that correct suspension geometry at the taller ride height, and clears up to 35\" tires.\u003c\/p\u003e\n\u003chr\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eBefore ordering:\u003c\/strong\u003e This kit does not fit diesel models or Tremor models, and will not work with trucks equipped with CCD (Continuous Controlled Damping). It requires frame bracket modification. Models with a 2-piece rear driveshaft will require a carrier bearing shim kit (Zone part D5405, not included) — and Ford issued Safety Recall 21S25 covering the rear driveshaft on some 2-piece-driveshaft trucks; Zone recommends completing that recall before installing this lift. Fitment coverage varies by model year and trim — confirm your exact configuration against the Verified Fitment table before ordering.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eRequired separately:\u003c\/strong\u003e Carrier bearing shim kit D5405, required on models with a 2-piece rear driveshaft (not included). 18\" or larger wheels are required — stock 17\"\/18\" wheels cannot be reinstalled. ADAS camera, radar, and sensor recalibration is likely necessary after installation and is the vehicle owner's responsibility and expense, arranged through a dealership or ADAS service center.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003ch4 dir=\"ltr\"\u003eVerified Fitment\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eFord F-150, 4WD\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eModel Year\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eTrims Covered\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eDrivetrain\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFuel Type\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021\u003c\/td\u003e\n\u003ctd\u003eKing Ranch, Lariat, Limited, Platinum, SSV, XL, XLT\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2022\u003c\/td\u003e\n\u003ctd\u003eKing Ranch, Lariat, Limited, Platinum, SSV, XL, XLT\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2023\u003c\/td\u003e\n\u003ctd\u003eKing Ranch, Lariat, Limited, Platinum, SSV, XL, XLT\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2024\u003c\/td\u003e\n\u003ctd\u003eKing Ranch, Platinum\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2024\u003c\/td\u003e\n\u003ctd\u003eSTX\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eFlex or Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2024\u003c\/td\u003e\n\u003ctd\u003eXL, XLT\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2025\u003c\/td\u003e\n\u003ctd\u003eKing Ranch, Lariat, Platinum, XLT\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2025\u003c\/td\u003e\n\u003ctd\u003eSTX\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2025\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eFlex or Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2026\u003c\/td\u003e\n\u003ctd\u003eKing Ranch, Platinum\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2026\u003c\/td\u003e\n\u003ctd\u003eSTX\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eFlex or Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2026\u003c\/td\u003e\n\u003ctd\u003eXL, XLT\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp dir=\"ltr\"\u003e\u003cem\u003eLimited and SSV trims are verified for 2021–2023 only — not listed for 2024–2026. Lariat is not listed for 2024 or 2026, but is verified again for 2025. STX first appears in 2024. Confirm your exact model year and trim against this table rather than assuming uniform coverage across 2021–2026.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eComponent Specifications\u003c\/h4\u003e\n\u003cdiv dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eAttribute\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eZone Off Road\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003eZONF91N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit type\u003c\/td\u003e\n\u003ctd\u003e4\" suspension lift kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront lift height\u003c\/td\u003e\n\u003ctd\u003e4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront lift method\u003c\/td\u003e\n\u003ctd\u003eCrossmember and strut spacer (retains factory front struts)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear lift height\u003c\/td\u003e\n\u003ctd\u003e3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear lift method\u003c\/td\u003e\n\u003ctd\u003eBlock kit (replaces factory 1-1\/4\" block; stock block not reinstalled)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear shocks included\u003c\/td\u003e\n\u003ctd\u003eYes — Zone Nitro Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear shock design\u003c\/td\u003e\n\u003ctd\u003eNitrogen-charged, twin-tube, 10-stage velocity-sensitive valving, dual-welded ends, self-lubricating seals, black powder coat finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear stance (this rear block option)\u003c\/td\u003e\n\u003ctd\u003eLevel to tail-high appearance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteering knuckles\u003c\/td\u003e\n\u003ctd\u003ePrecision-engineered, made in USA; redesigned for the 2021–2025 F-150 to maintain ESC system compliance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit contents\u003c\/td\u003e\n\u003ctd\u003eHeavy-duty crossmembers, differential drop, sway bar drop brackets, skid plate, rear lift blocks, new U-bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax tire clearance\u003c\/td\u003e\n\u003ctd\u003e35\" without modification; 37\" possible with crash bar modification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eADAS\/ESC compatibility\u003c\/td\u003e\n\u003ctd\u003eDesigned to maintain ESC system compliance; functions with Ford BlueCruise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEst. install time\u003c\/td\u003e\n\u003ctd\u003e8–10 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDifficulty level\u003c\/td\u003e\n\u003ctd\u003eDifficult\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eZone Factory Protection Plus — includes ESC system compatibility, limited lifetime warranty, and 5-year\/60,000-mile drivetrain warranty coverage; see full terms below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch4 dir=\"ltr\"\u003eWhat Is and Is NOT Included\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eHeavy-duty crossmembers\u003c\/li\u003e\n\u003cli\u003eDifferential drop\u003c\/li\u003e\n\u003cli\u003eSway bar drop brackets\u003c\/li\u003e\n\u003cli\u003eSkid plate\u003c\/li\u003e\n\u003cli\u003eRear lift blocks (3\" block kit, this configuration)\u003c\/li\u003e\n\u003cli\u003eNew U-bolts\u003c\/li\u003e\n\u003cli\u003eFront strut spacers\u003c\/li\u003e\n\u003cli\u003eZone Nitro Series rear shocks\u003c\/li\u003e\n\u003cli\u003eUSA-made steering knuckles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eCarrier bearing shim kit D5405 (required for 2-piece rear driveshaft models)\u003c\/li\u003e\n\u003cli\u003eFront struts (this configuration retains your factory front struts via strut spacers — it does not include replacement struts; see Product Family Reference for the loaded-strut configuration)\u003c\/li\u003e\n\u003cli\u003e18\"+ wheels and tires\u003c\/li\u003e\n\u003cli\u003eADAS\/ESC recalibration service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eCritical Compatibility\u003c\/h4\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003e\u003cstrong\u003eDoes not fit diesel models.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWill not fit Tremor models.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWill not work with trucks equipped with CCD (Continuous Controlled Damping).\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eRequires frame bracket modification.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-piece rear driveshaft models:\u003c\/strong\u003e Require carrier bearing shim kit D5405 (not included). Some 2-piece-driveshaft trucks are covered under Ford Safety Recall 21S25 for the rear driveshaft; Zone recommends completing that recall before installing this lift.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel and tire requirements:\u003c\/strong\u003e 18\" or larger diameter wheels required — stock 17\" and 18\" wheels cannot be reinstalled. Stock 20\" wheels can be reused with up to a 305\/60R20 tire. 18\" wheels with 5\"–5.5\" backspacing should be test-fit before mounting the tire, to confirm clearance to the steering knuckle\/tie rod. 18\"–20\" wheels with 5.5\"–5.75\" backspacing are highly recommended for tire-to-frame crash bar clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrash bar modification:\u003c\/strong\u003e May be required depending on wheel and tire choice, and is required for 37\" tires. Confirming that any such modification is non-detrimental to vehicle safety is the end user's responsibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eADAS recalibration:\u003c\/strong\u003e Recalibration of driver-assistance cameras, radar, LiDAR, and other sensors may be necessary after installation, arranged through a dealership or ADAS service center, at the vehicle owner's expense — similar to a wheel alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear block sizing:\u003c\/strong\u003e This configuration uses the 3\" rear block. A 2\" rear block option also exists for this kit; do not substitute block heights from the separate Loaded Strut front configuration, which uses different block-height recommendations (see Product Family Reference).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eEstimated install time is 8–10 hours; Zone rates this installation as Difficult. Professional installation is strongly recommended. If your truck has a 2-piece rear driveshaft, address Ford Safety Recall 21S25 (if applicable) before installation, and install carrier bearing shim kit D5405 (sourced separately).\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eFrame bracket modification is required as part of this installation. After installation, arrange ADAS camera, radar, and sensor recalibration through a dealership or ADAS service center. Refer to the current Zone Off Road installation instructions supplied with this kit for complete procedures, torque specifications, and all safety requirements.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eThe Obsidian Take\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eThe ZONF91N is Zone Off Road's 4\" F-150 lift kit in its strut-spacer front \/ Nitro Series rear configuration, paired with the 3\" rear block for a level-to-tail-high stance. It retains your factory front struts while correcting suspension geometry through Zone's USA-made steering knuckles, and clears 35\" tires without modification. Confirm these application conditions before ordering: it doesn't fit diesel or Tremor trucks or anything with CCD, it requires frame bracket modification, and 2-piece-rear-driveshaft trucks need the separately-sourced D5405 shim kit — and should have Ford's 21S25 recall addressed first if applicable.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eThis Product Is For You If\u003c\/h4\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eYou own a 2021–2026 Ford F-150, 4WD, whose exact model year and trim appears in the Verified Fitment table.\u003c\/li\u003e\n\u003cli\u003eYou want to retain your factory front struts via strut spacers rather than upgrading to loaded struts.\u003c\/li\u003e\n\u003cli\u003eYou want a level-to-tail-high rear stance from a 3\" rear block.\u003c\/li\u003e\n\u003cli\u003eYou are running up to 35\" tires (or prepared to modify crash bars for 37\").\u003c\/li\u003e\n\u003cli\u003eYou are prepared for a difficult, 8–10 hour professional installation involving frame bracket modification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eThis Product Is Not For You If\u003c\/h4\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eYou own a diesel or Tremor F-150.\u003c\/li\u003e\n\u003cli\u003eYour F-150 is equipped with CCD (Continuous Controlled Damping).\u003c\/li\u003e\n\u003cli\u003eYou have a 2-piece rear driveshaft and are not prepared to source the D5405 shim kit separately, or haven't addressed Ford Safety Recall 21S25 if it applies to your truck.\u003c\/li\u003e\n\u003cli\u003eYou want a fully loaded front strut rather than retaining your factory strut with a spacer — see the Loaded Strut configuration instead.\u003c\/li\u003e\n\u003cli\u003eYou want a tail-low-to-level rear stance rather than level-to-tail-high — see the 2\" rear block configuration instead.\u003c\/li\u003e\n\u003cli\u003eYou are not prepared to budget for ADAS recalibration after installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eProduct Family Reference\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eThis is one configuration of Zone's 4\" F-150 lift kit. Other configurations of this same kit include:\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront:\u003c\/strong\u003e Zone Nitro loaded struts (fully assembled, bolt-in) instead of strut spacers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear shocks:\u003c\/strong\u003e FOX 2.0 Adventure Series rear shocks instead of Nitro Series (available with the strut spacer front option)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear block:\u003c\/strong\u003e 2\" block kit instead of 3\" (tail-low-to-level stance)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cem\u003eNote: the Loaded Strut front configuration has different rear block height recommendations (5\" for a level stance, 4\" for tail-low) than this Strut Spacer configuration — don't cross-reference block height guidance between the two front configurations.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eZone also offers a 6\" suspension lift system for the F-150; see Zone's product line for details.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eCommon Questions\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eDoes this fit diesel F-150s?\u003c\/strong\u003e\u003cbr\u003eNo.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eDoes this fit the Tremor package?\u003c\/strong\u003e\u003cbr\u003eNo.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWill this work with my adaptive\/continuously controlled dampers?\u003c\/strong\u003e\u003cbr\u003eNo — this kit will not work with trucks equipped with CCD (Continuous Controlled Damping).\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eI have a 2-piece rear driveshaft — what do I need to know?\u003c\/strong\u003e\u003cbr\u003eYou'll need carrier bearing shim kit D5405, sourced separately (not included). Some 2-piece-driveshaft trucks are subject to Ford Safety Recall 21S25 for the rear driveshaft; Zone recommends completing that recall before installing this lift.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWhat tire size does this kit support?\u003c\/strong\u003e\u003cbr\u003eUp to 35\" without modification. 37\" tires are possible but will require crash bar modification.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWhat wheels do I need?\u003c\/strong\u003e\u003cbr\u003e18\" or larger diameter. Stock 17\" and 18\" wheels cannot be reinstalled. Stock 20\" wheels can be reused with up to a 305\/60R20 tire.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eDo I need an alignment or ADAS recalibration after installation?\u003c\/strong\u003e\u003cbr\u003eADAS camera, radar, LiDAR, and sensor recalibration is likely necessary and should be arranged through a dealership or ADAS service center, at your expense — similar to a wheel alignment.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eIs this compatible with Ford BlueCruise?\u003c\/strong\u003e\u003cbr\u003eYes, per Zone's specifications.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWhat's the difference between the 3\" and 2\" rear block?\u003c\/strong\u003e\u003cbr\u003eThe 3\" block (this configuration) gives a level-to-tail-high appearance. A 2\" block gives a tail-low-to-level stance. Both replace the factory 1-1\/4\" block, which is not reinstalled.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWhat is the warranty?\u003c\/strong\u003e\u003cbr\u003eZone's Factory Protection Plus program on this kit includes ESC system compatibility, a limited lifetime warranty, and a 5-year\/60,000-mile drivetrain warranty. See full warranty summary below.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eManufacturer Data Disclaimer\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eFitment, specification, compatibility, and installation data for this kit are sourced from Zone Off Road manufacturer product documentation and OFAS-verified product data current as of publication. Specifications are subject to change without notice; confirm current documentation for this SKU at the time of purchase.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eRequired Legal, Warning, Fitment, and Return Notices\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSafety Warning:\u003c\/strong\u003e This kit requires frame bracket modification and affects suspension and steering geometry. Professional installation is strongly recommended. Crash bar modifications, if required for your wheel and tire choice, are the end user's responsibility to confirm as non-detrimental to vehicle safety. ADAS recalibration after installation is necessary to maintain proper functionality of lane keeping, lane departure, parking assistance, blind-spot detection, adaptive cruise control, and related systems.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWarranty Summary:\u003c\/strong\u003e This kit is covered under Zone Off Road's Factory Protection Plus program, which includes ESC system compatibility, a limited lifetime warranty, and a 5-year\/60,000-mile drivetrain warranty. Full terms of Zone's warranty program were not otherwise detailed in the supplied source data — confirm complete warranty terms and claim procedures with current Zone Off Road documentation.\u003c\/p\u003e","brand":"Zone Off-Road","offers":[{"title":"Default Title","offer_id":51417111331137,"sku":"F91N","price":1395.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/1284\/1793\/files\/ZONF91N-FQMS.jpg?v=1771967291","url":"https:\/\/obsidianforgedautosupply.com\/products\/zone-off-road-4-inch-lift-kit-zonf91n-strut-spacer-nitro-ford-f150-2021-2026","provider":"Obsidian Forged Auto Supply","version":"1.0","type":"link"}