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1979-93 Fox Body Mustang IRS Swap

Give your Fox Body Mustang the ultimate rear suspension by converting to a independent rear suspension system for the 1979-1993 Mustang!

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Mustang IRS Suspension Kits

Mustang IRS Differential Parts

Differential Parts
One of the key weak points of the IRS is the diff cover, as it not only supports the weight of the differential. But when performing harder launches, they started noticing the diff cover was flexing beyond capacity and cracking. Installing a brace or upgraded cover reduces flex, strengthens the cover, and increases performance.

Mustang IRS Bushings

IRS Bushings

The entire rear suspension of the Cobra is attached to a steel subframe, which in turn is attached to the car with just four rubber bushings. The rubber bushings deflect under load, leading to wheel hop and less predictable handling. Changing most of the stock bushings to stiffer bushings will make the suspension much more predictable as well as fix the massive wheelhop issue specific to the independent rear suspensions.

Mustang IRS Sway Bar & Tie Rod Parts

Sway Bar & Tie Rods

A great upgrade to not only help with alignment but eliminate excessive bumpsteer. Fine-tuning the suspension qualities to ensure that you get down the road 100% in control of your Mustang. Whether you just need to replace the worn-out factory units or looking for an adjustable unit to further dial in your sway bar preload. 

Cobra Rear Brake Kits

Brake Components

More than likely, you will need new brakes for your Fox Body as the IRS has specific calipers and large 11.65” rotors. You can choose from stock replacements or a performance upgrade for your swap. Along with swapping out the other brake component to convert to rear disk if you haven’t already. 

Mustang IRS Rear Shocks

IRS Shocks

New shocks are going to be a must for the swap as the solid axle shock won’t attach to the new IRS cradle. Offering upgrade replacement all the way to fully adjustable shock helps you dial in the ride quality and performance you want out of your swap. 

Mustang IRS Rear Wheel Hub

Rear Wheel Hub

Refreshing the wheel hub and bearing in your new IRS is an easy insurance to prevent future issues. With unknown miles and a hard service life, your factory hubs and bearings are small parts that make a big difference to the quality of your Fox Body IRS swap. 

1979-1993 Mustang IRS Swaps

Making your Fox Body handle on the street or on the road course by converting to an independent rear suspension gives you the superior handling you want. Fox Body Mustang IRS conversions have been popular for years utilizing take-out 1999-04 Cobra rear suspension. It’s no secret that independent rear suspensions are superior in almost every way over a solid axle when it comes to handling.