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2015-2026 Ford Mustang – Steeda Hardcore IRS Differential Support Brackets
- Engineered and manufactured in Valdosta, Georgia
- CNC-machined billet construction where applicable
- Tested on Steeda's SCCA Majors race program
- Steeda authorized dealer — exact MAP pricing
Limited Lifetime Warranty
Backed by Steeda — FFP is an authorized Steeda dealer and warranty claims are honored direct.
Authorized Steeda Autosports dealer. MAP pricing — the same price as steeda.com. Expert install available at our Thousand Oaks, CA shop. Questions on fitment or setup? Chat with Senna or call our specialists.
The full breakdown.
Overview
Want to tear up the pavement and not your differential housing? Steeda has the part for you! Steeda’s HARDCORE S550/S650 Mustang Differential Brackets were developed after multiple aluminum differential housings had front ear failures at the track. This simple bolt-in part locks the differential in place and redistributes the loads so that the front ears are under less stress. This enables you to run the aluminum differential housing, which shaves 20+ lbs off of the rear of your Mustang! The Steeda HARDCORE S550/S650 Mustang Differential Brackets are a must for anyone running today’s compounds drag radials and slicks. NVH will be added, but this is a simple install that can be done before a track day and removed when hitting the streets in your daily.
Decrease wheel hop and rear differential movement on your Mustang by adding these braces, differential pinion rise and lateral movement are significantly reduced. Less drivetrain movement means more power to ground. More power to the ground means more enjoyment out of your Mustang.
Steeda’s design has also eliminated the single shear design which exists between the rear differential mounting ear and the rear subframe bushing, replacing it with a triple shear design. This reduces the average stress on the bolt, allowing for 3 times the load capacity! But Steeda didn’t stop there. We have also added upgraded hardware for an added factor of safety, ensuring you confidence when launching your Mustang.
Product Gallery
Key Benefits
Specifications
Video
📄Download Install Instructions (PDF) — Steeda’s official guide→
Fitment
2015-2026 Ford Mustang Mach 1/Bullitt/GT/EcoBoost/V6.
Steeda has been engineering and manufacturing Ford performance parts in-house in Valdosta, Georgia for over 35 years — proven on their own SCCA Majors race team and trusted by enthusiasts who live and breathe Ford. CNC-machined billet construction, proprietary CAD-driven suspension geometry, and a relentless focus on the platforms they specialize in.
QS-9000 & ISO 9001 manufacturing · Limited lifetime warranty on Steeda-manufactured parts · Made in the USA
FFP fits Steeda parts every week in Thousand Oaks.
— Why we stock Steeda
OE-style engineering, in-house manufacturing, race-proven on Steeda's own SCCA program.
Steeda has been engineering Mustang — and now Explorer, Focus, F-150, and Maverick — parts in Valdosta, Georgia since 1988. CNC-machined billet, proprietary CAD-driven suspension geometry, and a factory SCCA Majors road-racing team that runs their own parts on the track every weekend. When you bolt a Steeda part onto your car, it's the same part Steeda's own race cars run.
We carry Steeda because the fitment is right the first time, the warranty is real (lifetime on Steeda-manufactured parts), and the install instructions don't leave you guessing. Drop the car at our Thousand Oaks shop and our techs handle the fit-up — or order with confidence and run it yourself.
Authority: Charles Siritho · McLaren Artura Trophy owner · Spotter for Branden Sorensen FD Pro (E46 LS+Whipple, 6th at Long Beach R1 2026) · 10+ yrs Mustang & Corvette specialist
Other Steeda parts for your build.
2015-2026 Ford Mustang – Steeda Coupe Rear IRS Subframe Support Braces
2015-2026 Ford Mustang – Steeda IRS Subframe Alignment Kit
2015-2023 Ford Mustang – Steeda Coupe IRS Subframe Support Brace Replacement Hardware
2015-2023 Ford Mustang – Steeda 6-Speed Black Shift Knob
2015-2026 Ford Mustang – Steeda 'Stop the Hop' Street Starter Kit
Shop the full Steeda catalog at FFP.
The leader in Ford performance — suspension, intakes, exhaust, brakes, wheels, and more — for Mustang, Bronco, Bronco Sport, Explorer, F-150, and Maverick. Enthusiast-driven, race-tested. MAP pricing always. Expert installation in Thousand Oaks, CA.
