Whiteline Adjustable Rear Control Arms – 2015-2021 Ford Mustang

Whiteline Adjustable Rear Control Arms – 2015-2021 Ford Mustang

Full Rear Geometry Adjustment for the S550 Mustang
Whiteline’s adjustable rear control arms for the 2015-2021 Ford Mustang (S550) provide on-car adjustment of rear toe and camber beyond the factory alignment range. The S550’s IRS rear suspension is significantly more geometry-sensitive than the solid rear axle of the S197 — correct rear camber and toe are fundamental to extracting the IRS’s performance potential. These adjustable arms provide the capability to set that geometry precisely.

DETAILS

• Adjustable rear control arms for toe and camber correction on S550 IRS Mustang
• Expands rear alignment capability beyond factory limits
• Polyurethane bushings at chassis ends for consistent geometry under load
• Fitment: 2015-2021 Ford Mustang (S550 chassis, IRS)
• High-strength construction for performance and track use

S550 IRS and Rear Geometry
The S550 Mustang’s fully independent rear suspension is a genuine performance step up from the S197’s solid rear axle. IRS geometry sensitivity means correct rear camber and toe are more important than they were on the solid axle — too much or too little of either directly affects rear grip and handling balance at the limit.

Lowered S550 Applications
Lowered S550 Mustangs frequently move outside the factory rear alignment range. These adjustable arms provide the extended range to restore correct geometry at the actual ride height being used.

Track S550 Builds
For S550 Mustangs used for track days and autocross, optimized rear camber is important for rear tyre performance. The KTA228 allows alignment shops to achieve specific performance geometry settings.

Why Choose Whiteline

Whiteline has been engineering suspension components from their facility in Australia since 1979. Every product in their catalog is developed with a clear goal: measurable improvement in handling, stability, and tyre contact. Whiteline’s polyurethane bushings, sway bars, control arms, and alignment correction kits are engineered using finite element analysis and validated on track before they reach the market. Their components are direct-fit, bolt-on solutions designed for enthusiasts who want real performance gains without fabrication or custom work.

The RallySport Take

Full rear geometry adjustment for the S550 Mustang IRS platform. The hardware needed to take full advantage of the independent rear suspension.

What’s in the Box

• Adjustable rear control arms for toe and camber correction on S550 IRS Mustang
• Expands rear alignment capability beyond factory limits
• Polyurethane bushings at chassis ends for consistent geometry under load
• High-strength construction for performance and track use

Fitment