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Home | 15-17 Mustang | Suspension | IRS Components | 2015-21 Mustang GT Steeda 'Stop the Hop' Starter Kit

2015-21 Mustang GT Steeda 'Stop the Hop' Starter Kit

Item Number:555-4455
Market Price:$541.44Our Price:$474.95
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  • Description
  • Reviews



Our Sales Experts take calls all the time from enthusiasts that want to eliminate wheel hop while also staying on a tight budget. This is where the Stop the Hop Starter Kit comes in. Our team of engineers got together and came up with the best 3 parts for eliminating unwanted wheel hop in the new S550 Mustang. 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 S550 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.


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 it's kind in the performance aftermarket and so innovative and popular we patented it's 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. It's job is to prevent up and down movements of the subframe.

The 3rd and final piece to 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 best part about this kit, is the price. These 3 parts were the first of their kind for the S550 Mustang and nothing will prevent unwanted subframe movement or wheel hop better than this kit.

NOTE: Steeda IRS Subframe support braces will not fit convertible

Kit Includes:
  • 555-5754 - Steeda IRS Subframe Support Braces
  • 555-4437 - Steeda IRS Subframe Bushing Support System
  • 555-4438 - Steeda IRS Subframe Alignment Kit
Product Benefits:
  • Eliminate wheel hop while not increasing NVH
  • Eliminate subframe movement
  • Simple install
  • Squares subframe to the chassis
  • No permanent modifications

Ordered the cold air and tuner combo. Best tune I have had. Really woke up my 5.0

- C. Faulkner

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