Steeda S550 Mustang IRS Base Pack

€249 exc TAX

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! The ONLY part we recommend to EVERY Mustang S550 customer regardless of use or model. Fit it and thank us afterwards! Lock in your rear end with NO increase in NVH.

As a guide, EU delivery cost varies on service requested and weight / dimensions. Final rate depends on which EU Zone you are in for DPD services. Below are some guide examples. 

Some countries may be serviced with other providers if required.

FREE SHIPPING is available on orders over a certain amount (country dependant). Some product do not qualify for the free shipping offers due to the weight / size of the item. 

We aim to ship same day if ordered before midday.

1. Standard EU Shipping: DPD Courier with tracking - 2-3 days (for main EU countries)

DPD Zone 1: €14.99 + vat 0-5KG      - €19.99 5-30 KG

2. Small Items (via Royal Mail) -from 2 days - 2 weeks depending on location.

Covers all European countries:  €14.99 + vat 0-2KG:

You will receive a shipping notification with tracking details once order is processed.

NOTE  We can ship worldwide. Please contact us if assistance required as a custom shipping solution may be required.

We reserve the right to change charges and services as required.

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
  • Add our industry leading IRS Subframe Braces to step up to our "IRS Full Pack"
  • Normally in stock

More cost effective than others on the market to control wheel hop

We combined our ever so popular 555-4438 IRS Alignment Bushes and 555-4437 IRS Subframe Support Bushes 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+  Mustang GT & EcoBoost, 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+ Mustang GT & EcoBoost. 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+ Mustang GT or EcoBoost is easy to install, with basic hand tools. The Steeda IRS bushing kit also does not require any permanent modifications to the car.

 Wheel Hop Video:

Install Vids:




Install Guides:

555-4437 Install Guide   NOTE: 555-4437 DOES NOT FIT MACH ONE / GT350

555-4438 Install Guide


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