FFP · AUTHORIZED DEALER
The leader in Ford performance · Over 35 years · MAP pricing
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AUTHORIZED DEALER
2015-2026 Ford Mustang – Steeda 'Stop The Hop' Handling Enthusiast Kit
- 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
This is where the Stop the Hop Handling Enthusiast Kit comes in. Our team of engineers got together and came up with the best parts for eliminating unwanted wheel hop in the new S550/S650 Mustang to help you have greater control when driving. A kit that gives you the fundamental foundation for ultimate traction and suspension compliance. As we have explained before, the factory IRS subframe, (often inaccurately referred to as a cradle), mounts to the chassis with 4 mounting locations utilizing 4 soft rubber bushings with plenty of voids, even in the bolt holes. The kit we put together addresses these issues and more. This is perfect for anyone that enjoys a responsive and tight handling sports car or anyone occasionally racing in autocross or road course.
First is our Alignment dowel kit. This fills the factory bolt hole voids with CNC machined delrin inserts that will square up the rear subframe to the chassis. By filling these voids we are also limiting the side to side and front to back movement of the subframe that is present under hard acceleration and braking. Second is our tried and true IRS Subframe Bushing Support System. This 8 piece kit was a first of its kind in the performance aftermarket and so innovative and popular we patented its design! Made in-house from billet 6061 aluminum and featuring stainless steel hardware, this kit fills all the factory voids in the IRS subframe mounting locations. Its job is to prevent up and down movements of the subframe. The 3rd component of this kit is the strongest support brace for the S550 IRS on the market!! Made in house from chrome-moly steel, this brace is designed to support the factory subframe by directly tying it into the chassis at key mounting locations. Using factory mounting locations on the factory frame, this 5 point brace supports the front factory mount and the lower control arm mount as well. A simple bolt-in design, this brace ties the subframe to the chassis in the best possible way. The 4th piece is Steeda’s Adjustable Differential Bushing Insert System. These polyurethane bushings replace the soft rubber factory bushings that result in pinion changes, differential movement, and wheel hop. This will improve handling by helping to keep the rear of your Mustang connected. You can expect some increase in NVH and may experience increased transfer of gear whine noise problematic to some Super 8.8 IRS differentials .
Find out which Stop The Hop Kit is best for you!
On the Car
Key Benefits
Specifications
Video
Fitment
2015-2026 Ford Mustang GT500/Mach 1/Bullitt/GT/EcoBoost.
Note: Steeda IRS Subframe support braces will not fit convertible.
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 Dark Horse/GT/EcoBoost – Steeda Brembo 'Stop The Hop' Ultimate Handling…
2015-2023 Ford Mustang – Steeda Sport Suspension Package
2015-2023 Ford Mustang GT – Steeda Non-Performance Pack Handling Kit
2015-2023 Ford Mustang EcoBoost – Steeda Stage 1 Handling Package - Ultralite Linear
2015-2023 Ford Mustang EcoBoost – Steeda Stage 1 Handling Package - Linear
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.
