News: 2015 Mustang IRS Upgrades

2015 Mustang IRS Upgrades Featured

Independent Enhancements

The Driveshaft Shop and Lethal Performance team up to offer 2015 Mustang IRS upgrades

By Steve Turner
Photos courtesy of The Driveshaft Shop and Lethal Performance

The drivetrain experts at The Driveshaft Shop have gotten their hands on a complete Independent Rear Suspension assembly from a 2015 Mustang. They are currently developing a host of upgrades for the car, and these parts will be available from Lethal Performance.

In order to bring the Mustang to the world, Ford believed it needed an Independent Rear Suspension, and this our first look at the assembly out of the car. It won’t be easy for drag fans to swap in a solid-axle, so making this setup work and survive with big power will be the challenge.
In order to bring the Mustang to the world, Ford believed it needed an Independent Rear Suspension, and this our first look at the assembly out of the car. It won’t be easy for drag fans to swap in a solid-axle, so making this setup work and survive with big power will be the challenge.

Fortunately this gives us a chance to take a closer look at the real IRS assembly. This is what every wine-and-cheese car scribe has pined for in the Mustang. It’s going to be great to see how it really impacts the car’s handling. However, we know that the street/strip and drag guys will have to find a way to make it work with beyond-stock power levels.

That’s why The Driveshaft Shop is on the case. They are in the process of developing one-piece driveshafts—in aluminum and carbon fiber—to replace the two-piece stocker. Clearly these will be more durable and lighter, but the company does say the S550 two-piece is lighter than its S197 predecessor.

That halfshaft does look a little spindly. Fortunately DSS is building robust, direct-replacement halfshafts for the stock differential.
That halfshaft does look a little spindly. Fortunately DSS is building robust, direct-replacement halfshafts for the stock differential.

Naturally, The Driveshaft Shop is creating a set of stout halfshafts for those looking to upgrade the stock diff assembly with stouter sticks. The big news, however, is the company will also offer a 9-inch differential upgrade for the S550 IRS. This could be the game changer that keeps the mega-power 2015s together, as moving to a solid axle is only a convenient option for race cars with fuel cells.

Stay tuned. This is just the beginning. Once the new Mustangs hit the streets the aftermarket will boil over with upgrades, and we’ll be here to tell you about them.

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6 thoughts on “News: 2015 Mustang IRS Upgrades”

  1. Hard to tell. I have seen a couple different versions of the half-shafts (some noticeably beefier than others). I’m guessing powertrain choice determines which the car is equipped with.

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