Fits:
2017-2026 Ford Super Duty F-450 4x4 Power Stroke
2017-2026 Ford Super Duty F-550 4x4 Power Stroke
Important Fitment Details:
- You may need to perform the Ride Height Recalibration routine if your truck is equipped with headlamp leveling sensors.
- Does not fit on gasoline powered trucks.
Features:
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Complete Suspension System – Includes dual-rate coil springs, FOX 2.5 Performance Series HTO shocks, heavy-duty radius arms, bump stop spacers, and installation hardware for a properly engineered leveling system
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Dual-Rate 2.125" Lift Coil Springs – Specifically designed for Ford Power Stroke Super Duty trucks to improve ride quality while maintaining towing and hauling capability
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Death Grip Radius Arms – Fully boxed, gusseted design for maximum strength and long-term durability
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Integrated Caster Adjustment (+2°, +4°, +6°) – Dial in alignment, improve return-to-center, and eliminate steering wander
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FOX 2.5 Performance Series HTO Shocks – Large-body 2.5” monotube shocks feature FOX’s innovative Hydraulic Top Out (HTO) technology, delivering exceptional small-bump compliance, smoother rebound control, reduced top-out harshness, and increased confidence on and off the road.
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Heavy-Duty Adjustable Track Bar – Centers the axle and removes deflection from the factory setup
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Improved Ride & Handling – Components are engineered to work together for predictable on-road manners and increased confidence off-road
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6061 Billet Bump Stop Spacers – Maintains proper bump stop engagement and suspension travel on leveled applications
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Corrosion Resistant Shock Construction – Clear-anodized 6061-T6 aluminum shock bodies resist rust and improve heat dissipation compared to traditional steel-body shocks
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Direct Bolt-On Installation – No cutting, welding, or fabrication required
Description:
Kryptonite’s Stage 3 Leveling Kit for the 2017–2026 F-450 and F-550 is our most advanced and capable suspension system, built for those who demand the best in strength, control, and performance.
This is a complete, no-compromise solution designed from the ground up to correct suspension geometry, improve ride quality, and deliver unmatched steering stability—whether you’re daily driving, towing heavy, or running larger wheel and tire setups.
At the center of the system are our Death Grip Radius Arms, fully boxed and gusseted for maximum durability. Unlike factory arms or basic correction methods, these arms address geometry at its core while dramatically improving tracking, reducing wander, and increasing driver confidence.
The integrated multi-position caster system allows you to fine-tune alignment with +2°, +4°, or +6° settings, giving you precise control over steering feel and stability.
Supporting the system are Fox 2.5 Performance Series HTO shocks and custom-tuned coil springs, delivering a controlled, responsive ride without sacrificing load capacity. A heavy-duty adjustable track bar ensures proper axle alignment, while bump stop spacers maintain suspension integrity under compression.
Every component in this kit is engineered to work together—resulting in a system that not only levels your truck, but significantly improves how it performs in real-world conditions.
Includes:
- 2 x Fox 2.5 Performance Series HTO Front shocks - KRS002
- 2 x Fox 2.5 Performance Series HTO Rear shocks - KRS001
- 2 x 3" Leveling Coil Springs - KRFC25
- 2 x Radius Arms - KRFDRD1
- 1 x Adjustable Track Bar - KRFTB11-2
- 1 x Bump Stop Spacer Kit - KRFB25
- 1 x Brake Line Relocation Bracket - KRFB17
Warranty:
(Kryptonite No Fine Print Lifetime Warranty)
Kryptonite Steering & Suspension components are warrantied for life to their original purchaser. This warranty covers manufacturer defects, premature wear, or breakage. Race it, jump it, off‑road it, wreck it, lift it—we don’t care. If you can break it, we’ll replace it.
Your Kryptonite products must be purchased through an Authorized Dealer, and Warranty Registration completed within 90 days of purchase. Complete warranty details can be found [here].
