KellTrac 2015–2026 Mustang Rear Subframe Centering Sleeve Kit (KTI-BUK15CS) - Ford Mustang
The KellTrac Rear Subframe Centering Sleeve Kit is designed for Mustang owners who want their S550 or S650 chassis performing exactly as it should. One of the most common—and overlooked—issues on 2015+ Mustangs is an IRS subframe that isn’t perfectly centered from the factory. Once suspension, wheels, tires, or power are upgraded, this misalignment can lead to handling inconsistencies, uneven tire wear, and compromised performance.
Developed specifically for high-performance street and track applications, this KellTrac centering sleeve kit precisely squares the IRS subframe to the chassis, creating a stronger, more consistent mounting interface. By eliminating factory tolerances and guesswork, it allows your alignment to work as intended and ensures the rear of the car is properly positioned for maximum traction and stability.
Unlike multi-size or overly complicated alternatives, KellTrac engineered this kit to be lightweight, cost-effective, and accurately sized for optimal centering. The result is a simple yet critical upgrade that lays the foundation for better suspension geometry, improved drivability, and consistent performance.
Features
- Lightweight, cost-efficient design engineered to be the lightest on the market
- Precisely sized sleeves for accurate subframe centering
- Complete set of four sleeves with all required installation components
- Compatible with BMR and BMR-style IRS lockout kits
- 55mm sleeve height for proper subframe alignment
- Designed for vehicles retaining factory subframe bushings
Benefits
- Improves subframe-to-chassis mounting accuracy
- Squares and aligns the IRS subframe to the chassis
- Helps prevent premature or uneven tire wear
- Improves alignment consistency and overall performance
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
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
