Steeda's IRS replacement bushings are the big brother to the bushing inserts. These are polyurethane bushings that completely replace the factory bushings. While they offer more support and are great for racing applications, the installation process is more involved. Rather than the costly process of replacing the complete subframe, these give you the ability to fix and even upgrade your S550's existing subframe.
Greater support. The factory bushings leave a lot to be desired due to their compliance and voiding. These replacement bushings offer even more support than an insert kit and are the way to go if you do a lot of racing or have a power adder on your Mustang. Take control and eliminate unwanted IRS movement with this bushing kit.
Polyurethane bushings. A step up over the stock rubber bushings, these solid polyurethane bushings will put an end to your wheel hop. Polyurethane is not as compliant as rubber and will offer greater support when cornering or launching.