Kryptonite Stage 3 Leveling Kit with Fox 2.0 Shocks for 2017-2025 Ford Super Duty F-250/F-350

The Kryptonite Stage 3 Leveling Kit with FOX Performance Series 2.0 IFP Shocks is a complete front suspension system engineered specifically for 2017-2025 Ford Super Duty diesel trucks. Designed to improve ride quality, suspension geometry, steering stability, and overall durability, this package combines Kryptonite’s heavy-duty suspension components with FOX’s race-proven shock technology to create a suspension system built for demanding work trucks and recreational towing applications. At the core of the system are Kryptonite’s dual-rate coil springs, engineered around the unique weight and suspension requirements of the Super Duty platform. Unlike generic leveling springs, these coils are designed to improve ride comfort and suspension compliance while still maintaining the load-carrying capability these trucks are known for. Whether towing heavy trailers, hauling equipment, or driving unloaded, the spring design helps provide a controlled and comfortable ride without compromising capability. Handling suspension duties are FOX Performance Series 2.0 IFP shocks. Featuring a monotube design with an Internal Floating Piston, these shocks separate shock oil from the high-pressure nitrogen gas chamber to eliminate aeration and maintain consistent damping performance. FOX’s application-specific valving and race-developed high-flow piston design provide excellent control over rough pavement, expansion joints, washboard roads, and uneven terrain while delivering predictable handling both on and off-road. The precision-machined 6061-T6 aluminum shock body improves cooling efficiency and will never rust, making it ideal for trucks that see year-round use in harsh environments. Kryptonite heavy-duty radius arms further improve suspension performance by correcting front suspension geometry while significantly increasing strength and rigidity over factory components. Their fully boxed construction, internal gusseting, and adjustable caster correction allow steering geometry to be properly dialed in after lifting, improving straight-line tracking, reducing wander, and enhancing return-to-center characteristics. Combined with billet aluminum bump stop spacers and premium hardware throughout, this complete suspension system delivers improved ride quality, better steering control, enhanced durability, and the confidence expected from a Super Duty built to handle heavy workloads both on and off the pavement. 2.5” vs 3.5” Lift Explained Ford changed the factory ride height of the Super Duty platform starting in 2020, lowering the front suspension approximately 1” compared to 2005-2019 trucks. Because of this, the exact same Kryptonite leveling spring will produce different lift heights depending on model year. 2005-2019 Super Duty trucks will see approximately 2.5” of front lift 2020+ Super Duty trucks will see approximately 3.5” of front lift No changes were made to the spring itself, the newer trucks simply start from a lower factory ride height. 2020+ Tremor models already include a factory lifted suspension package and sit approximately 2” taller than a standard Super Duty from the factory. On Tremor-equipped trucks, these springs will provide approximately 1.5” of additional front lift.