KellTrac Double Adjustable Rear Coilover Kit, Street-Strip (KTI-RCO15DA-SS) - 2015–2026 Ford Mustang
The KellTrac Double Adjustable Rear Coilover Kit is engineered for Mustang owners who want better stance, better performance, and real adjustability without sacrificing street usability. Developed over more than a year of extensive testing, this Street-Strip–focused system delivers improved traction, sharper handling, and a more aggressive look—all while reducing overall rear suspension weight by an average of 20 pounds.
Built around legendary Viking Berserker double adjustable shocks, this rear coilover kit gives you the control needed to fine-tune your Mustang for changing surface conditions, driving styles, and power levels. From daily driving and spirited street use to autocross, road course, no-prep, and drag racing, this setup delivers consistent performance gains the moment it’s installed.
Assembled in-house and ready for installation, the KellTrac rear coilover system includes premium mounting hardware, reinforcement plates, and custom Landrum springs tailored to your application. The result is a versatile, competition-capable rear suspension upgrade that looks better, works harder, and adapts to how you drive.
Kit Includes
- KellTrac billet upper coilover shock mounts
- Extreme-strength zinc-coated upper and lower shock mount hardware
- Chassis reinforcement backing plates
- High-quality drill bit for upper shock mount installation
- Viking Berserker double adjustable coilover shocks
- Custom 2.25-inch diameter Landrum Performance coilover springs
- High-durometer polyurethane bumpstops pre-installed on shocks
- Zinc-coated lower offset shock T-bars
- Coilover adjustment spanner wrenches
- Rear sway bar relocation bracket kit
Features
- Designed and tested for street, strip, track, and autocross use
- Double adjustable compression and rebound valving
- Application-specific Viking Berserker shock valving and stroke
- Custom Landrum springs spec’d for each application
- Adjustable ride height and wheel rate tuning
- CNC-machined lightweight components rigid enough for competition
- High-quality spherical bearing mounts for precise suspension control
- Fully assembled and ready for installation
Benefits
- Reduces rear suspension weight by an average of 20 pounds
- Allows precise ride height and performance tuning
- Improves traction across a wide range of surfaces
- Enhances handling response and overall vehicle feel
- Supports a wide range of spring rates and power levels
- Quick installation, typically completed in about one hour
Important Notes
- This kit may increase NVH; not recommended if noise or vibration sensitivity is a concern
- Not designed for towing or off-road use
- Brake line and clearance checks are required; minor tab bending may be necessary
- Designed around 20x11 and 17x10 wheels with 27x11 or 28x11 tires
- Larger tire setups may require wheel spacing or minor modification
Fitment
- 2015 Ford Mustang
- 2016 Ford Mustang
- 2017 Ford Mustang
- 2018 Ford Mustang
- 2019 Ford Mustang
- 2020 Ford Mustang
- 2021 Ford Mustang
- 2022 Ford Mustang
- 2023 Ford Mustang
- 2024 Ford Mustang
- 2025 Ford Mustang
- 2026 Ford Mustang
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
