Steeda S550 IRS Subframe Alignment Kit | 2015+ Ford Mustang (Ecoboost, V6, GT) (555-4438)

Steeda Autosports
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The Steeda S550 IRS Subframe Alignment Kit for the 2015 Ford Mustang Ecoboost, V6 and GT is made from CNC-machined Delrin to preventing corrosion and keeping performance in mind, delrin also weighs less than aluminum or steel inserts. The Delrin sleeves fill the extra space left between the subframe mount and bolt from the factory and guarantees that the subframe will be bolted to the same location every time it is lowered, eliminating the need for unnecessary alignments.


  • Made from CNC machined, 6061 aluminum
  • No permanent modifications
  • Easy to install


  • Aligns subframe to chassis
  • No increase in NVH
  • No additional hardware needed


  • 2015 Ford Mustang Ecoboost
  • 2015 Ford Mustang V6
  • 2015 Ford Mustang GT
  • Notes: Works with either manual or automatic transmissions

Estimated time to install

What's in the box?

  • Steeda S550 Mustang IRS Subframe Alignment Kit


Lifetime Manufacturers warranty

Customer Reviews

Based on 1 review
Patrick Buchanan

Part does exactly what it says it'll do...great product. Great price, great quality. I would recommend these.