Kelltrac Adjustable Lowering Kit 4/8" Drop – Race Series (2015–2026 F-150)
The Kelltrac Adjustable Lowering Kit delivers the ultimate combination of aggressive stance, precision adjustability, and race-proven performance for 2015–2026 Ford F-150 trucks. Developed over a full year of real-world testing across street, drag strip, and no-prep surfaces, this Race Series kit dramatically enhances handling, traction, and drivability—all while maintaining impressive ride quality for daily use.
Engineered in collaboration with Viking Performance and UMI Performance, this system features Kelltrac-specific Viking Crusader valving, custom Landrum springs, increased shock travel, and spherical bearings front and rear for maximum control on any surface. Whether you're daily driving, street racing, or chasing every last hundredth at the drag strip, this kit offers unmatched adjustment capability and race-focused refinement for the leaf-spring F-150 platform.
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Adjustable 4"/8" drop for custom stance and optimized geometry
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Front Viking double-adjustable coilovers with spherical bearing mounts
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Rear Viking TRIPLE-adjustable shocks designed specifically for F-150 race use
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Greatly increased front shock travel for improved traction and control
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Tested extensively for street, drag strip, and no-prep conditions
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Delivers improved handling, sharper response, and balanced ride quality
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Includes every component needed for installation with no guesswork
Included Components
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Front height-adjustable double-adjustable Viking coilover system
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Kelltrac front coilover conversion mounts
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Adjustable front camber kit
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Rear stock-location Kelltrac TRIPLE-adjustable Viking shocks
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Bilstein high-density foam bump stops
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Monroe shock dust boots
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Rear leaf-spring flip kit
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Rear pinion-angle correction kit
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Transmission shim kit
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Low-profile rear bumpstops
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New rear leaf-spring hardware
Key Features
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Designed exclusively for street and drag strip performance
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Kelltrac-specific Viking Crusader shock valving and stroke
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CNC-machined lightweight components
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Adjustable compression & rebound damping
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Spherical bearing front mounts for precision response
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High-durometer polyurethane rear bushings for comfort
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Precision fitment for maximized traction and control
Performance Benefits
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Increased front suspension travel for better weight transfer
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Enhanced traction on all surfaces—prep, no-prep, or street
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Optimized valving for leaf-spring suspension dynamics
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Significant improvements in handling, grip, and overall feel
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Easy installation—typically 4 hours
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Fully adjustable ride height to match your performance goals
Notes
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Not designed for towing
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Frame notching may be required in some setups
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Max front camber adjustment averages around –2.0°
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Adjustable upper control arms may be required for less negative camber
Vehicle Fitment
- 2015 Ford F-150
- 2016 Ford F-150
- 2017 Ford F-150
- 2018 Ford F-150
- 2019 Ford F-150
- 2020 Ford F-150
- 2021 Ford F-150
- 2022 Ford F-150
- 2023 Ford F-150
- 2024 Ford F-150
- 2025 Ford F-150
- 2026 Ford F-150
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