Steeda S550 Subframe Alignment and Support kit


Steeda has come out with a kit that all S550 Mustang customers have been waiting for… ​The​ ​Steeda S550 Subframe Alignment and Bushing Support System!

Product Benefits

  • Our IRS Subframe Bushing Support system fills in all factory voids in order to eliminate movement of the IRS subframe
  • Utilizes all 4 factory mounting locations, which completely restricts shifting or rotation (Competitors only support 2 locations)
  • Practically no added weight to the vehicle
  • Uses precision machined Delrin sleeves which adds no NVH and limits vibration to the vehicle
  • CNC Machined parts for a precision fit unlike welded and stamped parts with slotted holes
  • Aligns AND holds the subframe in place, in all 4 mounting locations
  • Easy installation, can be done in under 2 hours
  • More cost effective than others on the market to control wheel hop

We combined our ever so popular 555-4438 and 555-4437 kits into a money savings combo kit where you the customer benefits! The S550’s subframe mounting holes are very large compared to the subframe mounting bolts. Since there is a large difference in bolt and hole size, the subframe can be mis-aligned from the factory up to 1/2″ left to right. The Steeda S550 Mustang IRS Subframe Alignment Kit is made from CNC-machined Delrin to avoid putting two dissimilar metals next to each other, preventing corrosion. Delrin is also less weight than aluminum or steel inserts and therefore keeping performance in mind. The Delrin sleeves slide into the subframe mounting holes, and fill the extra space left between the subframe mount and bolt from the factory therefore eliminating any movement. Our Steeda S550 Mustang IRS Subframe Alignment Kit guarantees that the subframe will be bolted to the same location every time it is lowered. Eliminating the need for unnecessary subframe alignments.

These Steeda S550 Mustang IRS Subframe Bushing Support System for your 2015-2017 Mustang GT, EcoBoost, and V6 gives the rear end a much more solid feel with no increase in NVH at all. The Steeda IRS Subframe bushings eliminate rear subframe movement notorious in the 2015-2017 Mustang GT, EcoBoost, and V6. A stiffened subframe allows the car to increase traction to the rear wheels and is the first step towards eliminating wheel hop. The Steeda S550 Mustang IRS Subframe Bushing Support System for your 2015-2017 Mustang GT, EcoBoost, and V6 are easy to install, with basic hand tools. The Steeda IRS bushing kit also does not require any permanent modifications to the car.


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