KellTrac Double Adjustable Rear Coilover Kit, Race Series (KTI-RCO15DA-R) - 2015–2026 Ford Mustang
The KellTrac Race Series Double Adjustable Rear Coilover Kit is built for Mustang owners who want maximum rear suspension performance with serious tuning capability. Designed for S550 and S650 Mustangs, this kit delivers aggressive adjustability, improved stance, and race-proven handling—while still remaining versatile enough for street, strip, track, and autocross use.
Developed through more than a year of extensive testing, this system provides greater rear wheel rate flexibility, improved shock control, and consistent performance across a wide range of surfaces and driving conditions. Built around legendary Viking Crusader double adjustable shocks and custom Landrum Performance springs, the Race Series kit offers a substantial performance upgrade while reducing rear suspension weight by an average of 20 pounds.
Assembled in-house and ready for installation, this kit delivers immediate improvements in traction, handling, and overall vehicle feel. If you’re pushing your Mustang harder than stock suspension allows, this system is engineered to keep up.
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 Crusader double adjustable rear 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
- Race Series rear coilover system for S550 and S650 Mustangs
- Double adjustable compression and rebound valving
- Viking Crusader-specific shock valving and stroke
- Custom Landrum springs spec’d to each application
- Adjustable ride height and wheel rate tuning
- CNC-machined lightweight components rigid enough for competition use
- 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
- Supports a wide range of spring rates and power levels
- Improves traction across street, strip, track, and autocross surfaces
- Enhances handling response and overall vehicle feel
- Quick installation, typically completed in about one hour
Important Notes
- This kit may increase NVH and is not recommended for NVH-sensitive vehicles
- 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
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