{"product_id":"icon-vehicle-dynamics-2021-2026-ford-f-150-4wd-stage-4-suspension-system-with-leaf-packs","title":"ICON Vehicle Dynamics 2021-2026 Ford F-150 4WD Stage 4 Suspension System with Leaf Packs","description":"\u003cp class=\"product-lead\"\u003eThe ICON Vehicle Dynamics Stage 4 Suspension System for 2021–2026 Ford F-150 4WD trucks delivers 3.5–4.5 inches of adjustable front lift and a 20% increase in front wheel travel over other ICON F-150 kits, using CNC-machined ductile iron steering knuckles that replicate the suspension geometry of the F-150 Tremor. The complete bolt-on system includes front coilovers, billet upper control arms, rear shocks, multi-rate leaf springs, and billet lowering shackles. Fitment is 4WD models only; lift range varies for PowerBoost hybrid and Power-Stroke diesel engines.\u003c\/p\u003e\n\u003cp class=\"product-shipping-note\"\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e ICON parts ship direct from ICON Vehicle Dynamics, mostly by UPS Ground. Lead times vary by part and some items are built to order, so please allow extra time. We email tracking as soon as your order ships.\u003c\/p\u003e\n\n\u003ch2\u003eTremor Geometry Without the Tremor Badge\u003c\/h2\u003e\n\u003cp\u003eThe high-strength CNC-machined ductile iron steering knuckles at the core of this system replicate the suspension geometry of the factory F-150 Tremor, effectively converting a standard F-150 4WD to Tremor suspension geometry. That geometry, combined with the 2.5\" coilovers, produces 20% more front wheel travel than other ICON F-150 suspension kits. The additional travel gives the suspension room to work through rough terrain without binding.\u003c\/p\u003e\n\n\u003ch2\u003eIndependent High- and Low-Speed Compression Tuning\u003c\/h2\u003e\n\u003cp\u003eEvery shock absorber in this system is equipped with ICON's CDXS (Compression Damping Dual Speed) valve. CDXS controls fluid flow under compression with independent adjustability for high-speed and low-speed compression force, using 10 detented settings on each knob. A driver can dial handling response and overall aggressiveness independently, adjusting low-speed control separately from high-speed compliance.\u003c\/p\u003e\n\n\u003ch2\u003eRear Suspension Rebuilt from the Springs Up\u003c\/h2\u003e\n\u003cp\u003eICON Multi-Rate Leaf Springs replace the factory rear leaf pack and eliminate the factory rear blocks, reducing axle wrap and allowing three user-selectable spring rate configurations. With the included billet aluminum 1\" lowering shackles, rear lift ranges from 1.5\" (as shipped, unloaded) to 3.5\" over stock, or the spring rate can be tuned upward to compensate for constant rear loads up to 850 lb. The 2.5 Aluminum Series CDXS piggyback reservoir rear shocks use vehicle-specific valving and carry the same independent compression adjustment as the front units.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTremor-geometry steering knuckles:\u003c\/strong\u003e CNC-machined ductile iron front knuckles replicate F-150 Tremor suspension geometry\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable front lift:\u003c\/strong\u003e 2.5\" CDCV remote-reservoir coilovers adjustable for 3.5–4.5\" of front lift over stock\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDelta Joint PRO upper control arms:\u003c\/strong\u003e billet aluminum UCAs with ICON's patented rebuildable Delta Joint PRO, offering 90 degrees of articulation and on-vehicle caster\/camber adjustment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCDXS on all four corners:\u003c\/strong\u003e independent high- and low-speed compression adjustment with 10 detented settings per knob, front and rear\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-rate leaf springs:\u003c\/strong\u003e three selectable rear spring rates; eliminates factory rear blocks to reduce axle wrap\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e100% bolt-on installation:\u003c\/strong\u003e no cutting or welding required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eDetail\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFitment\u003c\/td\u003e\n      \u003ctd\u003e2021–2026 Ford F-150 4WD (excludes Raptor, factory electronic suspension, OnBoard Scales)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFront lift range (standard engines)\u003c\/td\u003e\n      \u003ctd\u003e3.5–4.5\" over stock\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFront lift range (PowerBoost hybrid)\u003c\/td\u003e\n      \u003ctd\u003e3.25–4.25\" over stock\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFront lift range (Power-Stroke diesel)\u003c\/td\u003e\n      \u003ctd\u003e3–4\" over stock\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRear lift range\u003c\/td\u003e\n      \u003ctd\u003e1.5–3.5\" over stock (unloaded, depending on spring rate selection)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFront shock diameter\u003c\/td\u003e\n      \u003ctd\u003e2.5\"\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFront shock type\u003c\/td\u003e\n      \u003ctd\u003eCoilover with CDCV remote reservoir\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRear shock type\u003c\/td\u003e\n      \u003ctd\u003e2.5 Aluminum Series CDXS piggyback reservoir\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCompression adjustment\u003c\/td\u003e\n      \u003ctd\u003eCDXS, independent high- and low-speed, 10 detented settings each\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eUpper control arms\u003c\/td\u003e\n      \u003ctd\u003eBillet aluminum with Delta Joint PRO (patented, rebuildable)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSteering knuckles\u003c\/td\u003e\n      \u003ctd\u003eCNC-machined ductile iron, Tremor geometry\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRear springs\u003c\/td\u003e\n      \u003ctd\u003eICON Multi-Rate Leaf Springs, 3 selectable rates\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShackles\u003c\/td\u003e\n      \u003ctd\u003eBillet aluminum 1\" lowering shackles with OE Ford bushings\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShock shaft diameter\u003c\/td\u003e\n      \u003ctd\u003e7\/8\" (front and rear)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCoilover body finish\u003c\/td\u003e\n      \u003ctd\u003eCAD plated, corrosion resistant\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSystem weight (shipped)\u003c\/td\u003e\n      \u003ctd\u003e426 lb\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSKU\u003c\/td\u003e\n      \u003ctd\u003eK93144LD\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Is For and Isn't\u003c\/h2\u003e\n\u003cp class=\"product-fit-yes\"\u003eThis system suits 2021–2026 Ford F-150 4WD owners who want a significant lift, meaningfully more front wheel travel, and the ability to tune compression damping independently for both street and off-road use. The multi-rate rear leaf springs also make it practical for trucks that carry variable rear loads.\u003c\/p\u003e\n\u003cp class=\"product-fit-no\"\u003eThis system does not fit F-150 Raptor models, any F-150 equipped with factory electronically controlled suspension, or any F-150 equipped with OnBoard Scales. It is not compatible with all factory wheel and tire combinations; aftermarket wheels with lower offset are recommended. Trucks with Dynamic Bending Headlamps require a separate sensor bracket kit (ICON part 611071; if also equipped with OnBoard Scales, part 611081 is additionally required). ADAS recalibration is required after installation. California residents: this product contains chemicals known to the State of California to cause cancer, birth anomalies, or other reproductive harm.\u003c\/p\u003e\n\n\u003ch2\u003eCommon Questions\u003c\/h2\u003e\n\u003ch3 class=\"product-faq-q\"\u003eDoes this system fit the F-150 Raptor?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThe ICON Stage 4 system for the 2021–2026 Ford F-150 4WD does not fit the F-150 Raptor. ICON produces separate suspension systems designed specifically for the Raptor platform.\u003c\/p\u003e\n\n\u003ch3 class=\"product-faq-q\"\u003eWhat front lift height can I expect with a PowerBoost hybrid or Power-Stroke diesel engine?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eOn a PowerBoost hybrid F-150, the front coilovers in this Stage 4 system provide a lift range of 3.25–4.25\" over stock rather than the standard 3.5–4.5\". On a Power-Stroke diesel F-150, the front lift range is 3–4\" over stock. Both ranges are adjustable within those bounds.\u003c\/p\u003e\n\n\u003ch3 class=\"product-faq-q\"\u003eIs cutting or welding required to install this system?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThe ICON Stage 4 system for the 2021–2026 Ford F-150 4WD is a 100% bolt-on system. No cutting or welding is required for installation. ADAS recalibration is required after install, and trucks with Dynamic Bending Headlamps need a separately purchased sensor bracket kit.\u003c\/p\u003e\n\n\u003ch3 class=\"product-faq-q\"\u003eWhat are the three rear spring rate options?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThe ICON Multi-Rate Leaf Springs ship in Option 1 configuration, providing 1.5\" of rear lift over stock (unloaded). Option 2 adds 20% spring rate over Option 1, raising rear lift to 2.75\" unloaded (1.5\" with a 400 lb constant load). Option 3 adds 40% spring rate over Option 1, raising rear lift to 3.5\" unloaded (1\" with an 850 lb constant load).\u003c\/p\u003e\n\n\u003ch3 class=\"product-faq-q\"\u003eCan the Delta Joint PRO be serviced without replacing the entire upper control arm?\u003c\/h3\u003e\n\u003cp class=\"product-faq-a\"\u003eThe Delta Joint PRO used in the billet aluminum upper control arms of this Stage 4 system is designed to be rebuildable and serviceable. Any component of the joint can be removed, inspected, and replaced individually without purchasing a complete new joint.\u003c\/p\u003e","brand":"ICON Vehicle Dynamics","offers":[{"title":"Default Title","offer_id":50631365853254,"sku":"K93144LD","price":8086.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0691\/2203\/1686\/files\/b556d98bd909300e91721341570c24c4-sq.jpg?v=1791965419","url":"https:\/\/terrainvault.com\/products\/icon-vehicle-dynamics-2021-2026-ford-f-150-4wd-stage-4-suspension-system-with-leaf-packs","provider":"TerrainVault","version":"1.0","type":"link"}