Maintains positive caster through suspension travel
CDCV shocks offer 10 compression settings
Piggyback reservoirs improve damping consistency
Dual rate coils improve vehicle control
Adjustable track bar improves axle positioning
Vehicle specific shocks improve ride quality
Fully rebuildable and revalvable shocks
Supports recommended 37 inch tires
Corrosion resistant aluminum shock bodies
Unlock More From Your Super Duty Suspension
There comes a point where adding height is not enough, especially if you expect your Super Duty to feel just as capable on rough terrain as it does pulling onto the highway. The ICON K64514 Stage 4 Suspension System gives 2017-2019 Ford F250 and F350 Super Duty 4WD trucks 4.5 inches of lift while transforming how the front suspension moves and responds. Its four link system eliminates much of the suspension bind associated with the factory radius arms, allowing the front end to articulate more freely when the terrain starts working each wheel independently. Approximately 50 percent more front wheel travel gives the suspension additional room to absorb rough surfaces, while dual rate coil springs help maintain controlled and comfortable behavior across changing conditions. ICON CDCV shocks add another level of versatility with 10 compression settings, letting you dial in the damping for daily driving, towing, job site duty, or more demanding off road adventures. The added height also provides clearance for recommended 37 by 12.50 inch tires, giving the truck the footprint and stance to complement its upgraded suspension capability. If you want a Super Duty that can handle serious weekend terrain without becoming a chore during the workweek, Stage 4 brings together the travel, adjustability, and suspension geometry to make that balance possible.
Four Link Control Changes How The Front End Moves
At the heart of the K64514 Stage 4 system is ICON's four link conversion, which replaces the limitations of the factory radius arm arrangement with upper and lower links designed for improved articulation. By reducing suspension bind and maintaining positive caster throughout the range of travel, the four link geometry helps preserve predictable handling as the front axle moves through compression and extension. ICON pairs this setup with 4.5 inch dual rate coil springs and an adjustable track bar, allowing the axle to remain properly positioned beneath the truck at the increased ride height. Front and rear 2.5 inch Aluminum Series piggyback reservoir shocks use vehicle specific tuning and CDCV technology to provide 10 levels of externally adjustable compression damping. Their anodized aluminum bodies resist corrosion, while 7/8 inch shafts and FK rod end bearings support durability and minimize unwanted deflection during suspension movement. The shocks are also fully rebuildable and revalvable, giving owners a serviceable damping package that can be maintained as the truck accumulates miles. Finished with a 5 inch rear block kit and matched rear shocks, the system brings lift height, axle control, damping, and suspension geometry together as one thoroughly engineered package.
Fitment: 2017, 2016, 2019 Ford F250/F350 Super Duty 4WD w/ 4.5" Lift
Notes:
Fits 2017-2019 Ford F250 and F350 4WD
Springs are rated for diesel engines only
Recommended tire size is 37 x 12.50 inches
Larger tires may require trimming or modifications
Recommended Aftermarket Tires: 37" x 12.50" (Larger tires may fit but fender trimming and modifications will be required.)
APPLICATION NOTE #6: Springs Are Rated For Diesel Engines Only
APPLICATION NOTE #8: This System May Require A Carrier Bearing Drop Bracket Kit (33700)
APPLICATION NOTE #31: ‘08 - Current Superduty Models With Gas Engines May Need Exhaust Modified To Clear Front Driveshaft
APPLICATION NOTE #55: Shocks Are Fully Serviceable. Coilover Heights Indicated Are For A Stock Equipped Vehicle
TECH NOTE: Brake line kit (Part # 61110) is optional for end users who do not want to bend the factory steel lines or are looking for a braided stainless upgrade (not necessary for complete install)
Ships in multiple boxes
System Components:
64050 (qty: 1) | 08-22 FSD FRONT 4.5" BOX KIT
64010 (qty: 1) | 05-19 FSD FRONT 4.5" DUAL RATE SPRING KIT