Kelltrac Double Adjustable Rear Street Coilover Kit (2015–2026 Mustang)
The Kelltrac Double Adjustable Rear Street Coilover Kit is engineered for S550 and S650 Mustang owners who want sharper handling, improved stance, and fully tuneable rear suspension performance—all while maintaining excellent street comfort. Developed over more than a year of real-world testing, this system gives enthusiasts dramatically more adjustment for variable surfaces, increased wheel-rate capability, and up to 20 lbs of weight savings compared to factory components.
Whether you're daily driving, carving corners, hitting the autocross, or competing in drag and no-prep events, this Street Series coilover kit delivers a major upgrade in rear suspension control. Featuring Viking Warrior double-adjustable shocks, custom Landrum springs, spherical-bearing mounts, and reinforced hardware, the system is built for precision, durability, and real performance gains across every driving environment.
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Saves an average of 20 lbs compared to stock components
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Adjustable ride height for perfect stance and geometry
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Double adjustable Viking Warrior shocks for compression & rebound control
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Ideal for street, autocross, drag, and track-focused builds
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Includes billet shock mounts, hardware, and sway bar relocation brackets
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Provides enhanced wheel rate options for higher-level performance tuning
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Quick and simple installation—about 1 hour
Included Components
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Kelltrac billet upper coilover mounts
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Extreme-strength zinc-coated mounting hardware
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Chassis reinforcement backing plates
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Premium drill bit for shock mount installation
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Viking Warrior double-adjustable rear coilover shocks
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Custom 2.25" Landrum coilover springs
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High-durometer polyurethane bumpstops
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Zinc-coated offset lower shock T-bars
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Lower shock mount hardware
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Coilover spanner wrenches
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Rear sway bar relocation bracket kit
Key Features
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Designed for STREET, STRIP, TRACK & AUTOCROSS applications
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Viking Warrior shock valving engineered for high-performance Mustangs
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CNC-machined lightweight and rigid components
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Fully adjustable compression and rebound
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Height-adjustable to fine-tune stance and balance
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Spherical-bearing mounts for maximum suspension precision
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Precision-fit design ensures perfect alignment and reliability
Performance Benefits
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Significant weight reduction for improved response
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Dramatically sharper handling and traction on all surfaces
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Wide spring-rate selection for personalized performance tuning
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Improved consistency in launches, cornering, and braking
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Enhanced ride quality with adjustability for every driving style
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Quick install with minimal tools required
Notes
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May increase NVH (noise, vibration, harshness) — not ideal for comfort-focused builds
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Not designed for towing or off-road use
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Check all line clearances; minor tab adjustments may be needed
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Designed around 20x11 and 17x10 wheels with 27x11–28x11 tires; larger tires may require spacing or modification
Vehicle Fitment
- 2015 Ford Mustang (S550)
- 2016 Ford Mustang (S550)
- 2017 Ford Mustang (S550)
- 2018 Ford Mustang (S550)
- 2019 Ford Mustang (S550)
- 2020 Ford Mustang (S550)
- 2021 Ford Mustang (S550)
- 2022 Ford Mustang (S550)
- 2023 Ford Mustang (S550)
- 2024 Ford Mustang (S650)
- 2025 Ford Mustang (S650)
- 2026 Ford Mustang (S650)
Kelltrac Terms Of Service
Kelly considers his Kelltrac line to be a specialty line for a unique customer base and has his own terms of service in addition to Beefcake Racing's. You must accept these terms on all Kelltrac orders. Please read shipping times, cancellation, and returns. If time is of the essence, we do have other options that can ship right away / quicker. Just reach out to one of our sales associates at Beefcake Racing.
Cancellations & Returns
KellTrac Innovations does not accept product returns. Once your order ships, you own it and we will not accept it back - NO EXCEPTIONS. We do not accept order cancellations after the product has shipped. If you understand and accept this please check the box and continue checking out. If you do not accept this, please stop and discontinue the order process. Thanks!
Due to the custom nature of our business and product offerings, we charge a 20% order cancellation fee, period, non-negotiable, no matter who you are. Orders can only be cancelled before the product ships. We do not accept order cancellations after the product has shipped. If you understand and accept this please check the box and continue checking out. If you do not accept this, please stop and discontinue the order process. Thanks!
Leadtime
Please be aware that most orders ship within 2-4 weeks. In some (rare) cases, orders can take up to 6-8 weeks to ship. Holidays can severely impact these lead times. *DO NOT CONTACT US ABOUT YOUR ORDER UNLESS IT IS OLDER THAN 20 BUSINESS DAYS!* If you understand and accept this please check the box and continue checking out. If you do not accept this, please stop and discontinue the order process. Thanks!
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
