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|Performance Engineering Since 1988
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 per formance
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 Mustang 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.
Steeda's Rear Toe Links are the 4th item in the kit. They help you improve your launch and allows you to control the
toe of your Mustang during launches. Improve your 60-foot times and get down track faster with this upgrade from
Steeda.
5th in the kit, the Steeda Billet Vertical Links with Urethane Bushings reduce deflection and tighten the rear of
your Mustang. This CNC machined 6061 billet aluminum piece is a great step up over the stamped factory piece.
Reducing bushing deflection will help you put more power to the ground and improve control, while also preventing
unwanted movement and wheel hop. Bushing deflection from the stock rubber bushings can cause sloppy or soft handling
and will hold your Ford back from reaching its full potential.
The 6th 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 S550/S650 connected. You can expect some increase in NVH and may
experienceincreased
transfer of gear whine noise problematic to some Super 8.8 IRS differentials.
NOTE: Coupe fitment only. Steeda IRS Subframe Support Braces will not fit convertibles. Will not fit 2024+
Mustang equipped with base brakes.
Find outwhich Stop The Hop
Kitis best for you!
You'll get an instant confirmation email with your part details and invoice. We source from a network of authorized suppliers across the country, so lead times vary by brand and part type — we'll send a tracking number the moment your parts move.
Made-to-order builds — carbon fiber bodywork, fabricated systems, custom finish work — run longer than off-the-shelf items because they're built per order. You'll get progress updates throughout the build.
Need a specific timeline on a part before you buy? Call 805-267-9762 or hit the chat — we'll check vendor stock direct and give you a straight answer.
Absolutely! Once your order ships, you'll get an email with a tracking link so you can follow its journey from our shop to your doorstep.
If your order ships via freight, you'll get a separate email with a direct link to the carrier's tracking page — easy and stress-free.
Things happen on the road — even to boxes. If your order arrives damaged, snap a few clear photos of the box and product and send them our way right away.
If your shipment is lost, just email or call us — we'll help track it down and guide you through the next steps to make it right.
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or email Support@FFPerformance.co
Car parts can be a maze — good thing we brought the map. Our team's here to keep things smooth, simple, and maybe even a little fun.
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