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SPL Parts 2015+ Ford Mustang (S550) Rear Toe Links - Black Ops Auto Works
SPL Parts 2015+ Ford Mustang (S550) Rear Toe Links - Black Ops Auto Works
SPL Parts 2015+ Ford Mustang (S550) Rear Toe Links - Black Ops Auto Works
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SPL Parts 2015+ Ford Mustang (S550) Rear Toe Links

SPL Parts
SPPSPL RTA S550
SPL RTA S550
Control Arms
Out of stock
$ 449.00 $ 404.10

Precision Rear Toe Adjustment for the Ford Mustang S550 Platform

The SPL RTA S550 Rear Toe Links replace the factory rubber-bushed rear toe links on 2015 to 2023 Ford Mustang with high-precision aluminum and titanium hardware built for performance street driving and track use. The OEM rear suspension on the Mustang IRS platform uses rubber bushings that deflect under hard cornering and braking, causing toe to shift unpredictably mid-corner. The SPL RTA S550 eliminates that compliance by pairing gun-drilled 2024 aluminum links with 6061-T6 aluminum rotating clamps and 3-piece PTFE-lined FK rod ends manufactured in Connecticut. Setting toe is a single-person operation: the rotating clamp requires only a 3/16-inch Allen key, eliminating the two-wrench juggling act associated with traditional threaded adjuster jam nuts. Compatible across all S550 trim levels from the base EcoBoost to the Shelby GT500.

Features and Benefits

  • Gun-drilled 2024 Aluminum center links reduce unsprung weight and flex compared to OEM steel
  • 6061-T6 Aluminum 360-degree rotating clamp for jam-nut-free toe adjustment
  • Blue anodized Ti-6Al-4V Titanium socket head cap screws for clamping hardware
  • 3-piece PTFE-lined FK rod ends (Connecticut, USA) eliminate bushing deflection under cornering loads
  • Teflon liner rated from -65 to 325 degrees Fahrenheit for track durability
  • Covers all S550 trims including EcoBoost, GT, GT350, GT350R, GT500, Mach 1, and Bullitt
  • Sufficient adjustment range for performance alignments on lowered vehicles
  • Sold as a pair with all installation hardware included
  • Made in the USA

Fitment

Year Make Model Trim
2019 Ford Mustang Bullitt
2020 Ford Mustang Bullitt
2015 Ford Mustang EcoBoost
2016 Ford Mustang EcoBoost
2017 Ford Mustang EcoBoost
2018 Ford Mustang EcoBoost
2019 Ford Mustang EcoBoost
2020 Ford Mustang EcoBoost
2021 Ford Mustang EcoBoost
2022 Ford Mustang EcoBoost
2023 Ford Mustang EcoBoost
2015 Ford Mustang EcoBoost Premium
2016 Ford Mustang EcoBoost Premium
2017 Ford Mustang EcoBoost Premium
2018 Ford Mustang EcoBoost Premium
2019 Ford Mustang EcoBoost Premium
2020 Ford Mustang EcoBoost Premium
2021 Ford Mustang EcoBoost Premium
2022 Ford Mustang EcoBoost Premium
2023 Ford Mustang EcoBoost Premium
2015 Ford Mustang GT
2016 Ford Mustang GT
2017 Ford Mustang GT
2018 Ford Mustang GT
2019 Ford Mustang GT
2020 Ford Mustang GT
2021 Ford Mustang GT
2022 Ford Mustang GT
2023 Ford Mustang GT
2015 Ford Mustang GT 50 Years Limited Edition
2015 Ford Mustang GT Premium
2016 Ford Mustang GT Premium
2017 Ford Mustang GT Premium
2018 Ford Mustang GT Premium
2019 Ford Mustang GT Premium
2020 Ford Mustang GT Premium
2021 Ford Mustang GT Premium
2022 Ford Mustang GT Premium
2023 Ford Mustang GT Premium
2021 Ford Mustang Mach 1
2022 Ford Mustang Mach 1
2023 Ford Mustang Mach 1
2015 Ford Mustang Shelby GT350
2016 Ford Mustang Shelby GT350
2017 Ford Mustang Shelby GT350
2018 Ford Mustang Shelby GT350
2019 Ford Mustang Shelby GT350
2020 Ford Mustang Shelby GT350
2015 Ford Mustang Shelby GT350R
2016 Ford Mustang Shelby GT350R
2017 Ford Mustang Shelby GT350R
2018 Ford Mustang Shelby GT350R
2019 Ford Mustang Shelby GT350R
2020 Ford Mustang Shelby GT350R
2020 Ford Mustang Shelby GT500
2021 Ford Mustang Shelby GT500
2022 Ford Mustang Shelby GT500
2015 Ford Mustang V6
2016 Ford Mustang V6
2017 Ford Mustang V6

Specifications

Specification Detail
Part Number SPL RTA S550
Material 2024 Aluminum links; 6061-T6 Aluminum clamps; Ti-6Al-4V Titanium hardware
Rod End Type 3-piece PTFE-lined FK rod ends (made in Connecticut, USA)
Operating Temperature -65 to 325 degrees Fahrenheit
Adjustment Method 360-degree rotating clamp; no jam nuts required
Quantity Pair (2 toe links)
Note Special order item; allow additional lead time
Warranty 1-Year Limited Warranty
Country of Origin Made in the USA

What's Included

  • 2 x SPL RTA S550 rear toe links (gun-drilled 2024 aluminum)
  • Blue anodized Ti-6Al-4V Titanium socket head cap screws
  • 6061-T6 Aluminum rotating clamps
  • Installation hardware and instructions

Frequently Asked Questions

Does the SPL RTA S550 fit every S550 Mustang trim?
Yes. The SPL RTA S550 fits all S550 Mustang trims from 2015 to 2023, including EcoBoost, EcoBoost Premium, GT, GT Premium, GT 50 Years Limited Edition, Mach 1, Shelby GT350, Shelby GT350R, Shelby GT500, V6, and Bullitt. All share the same rear IRS toe link mounting points.

Why is this listed as a special order item?
The SPL RTA S550 is built to order in low volumes by SPL Parts. Lead time is typically one to two weeks from order placement. Contact us before ordering if your timeline is critical.

How does the rotating clamp adjustment work?
The 6061-T6 aluminum rotating collar slides over the threaded center link. At the alignment rack, loosen the two Ti-6Al-4V clamp bolts with a 3/16-inch Allen key, rotate the center link to the target toe value, and re-tighten. One technician can set toe accurately without a second person holding a jam nut.

What improvement will I notice on track after installing the SPL RTA S550?
The primary gain is consistency. The factory rubber bushings deflect by several degrees under hard lateral loading, causing the rear end to toe out unpredictably under high cornering forces. Replacing them with these links locks the rear alignment setting and makes the car's balance repeatable lap to lap.

What is the temperature range of the FK rod end liner?
The PTFE liner in each FK rod end is rated from -65 to 325 degrees Fahrenheit. This covers the wheel-well thermal environment of any road or track car regardless of climate.

Are these compatible with Mustang Shelby GT350 and GT500 suspension geometry?
Yes. The rear toe link mounting geometry is shared across the S550 platform. These links fit the GT350, GT350R, and GT500 without modification.

Will installing the SPL RTA S550 affect my Ford factory warranty?
Under the Magnuson-Moss Warranty Act, Ford cannot void your entire vehicle warranty solely because you installed an aftermarket suspension component. Ford would need to demonstrate that the specific aftermarket part directly caused the failure being claimed.

What torque spec should I use for the chassis fasteners?
Torque the rear toe link fasteners to OEM Ford specification for your model year. Refer to the Ford workshop manual for your specific year and engine variant. Tighten the SPL rotating clamp bolts with a 3/16-inch Allen key once toe is confirmed at the alignment rack.

Installation Instructions

  1. Lift the vehicle and support safely on jack stands; support the rear knuckle to prevent suspension droop.
  2. Remove the OEM rear toe link bolts at both the subframe and the knuckle mounting points.
  3. Record or photograph the OEM link orientation to use as a baseline starting length for the SPL RTA S550.
  4. Thread the SPL RTA S550 into both mounting locations and hand-tighten only at this stage.
  5. Torque both fasteners to OEM Ford specification per the service manual for your model year.
  6. Reinstall the rear wheel and lower the vehicle to the ground.
  7. Take the vehicle to an alignment shop for a full four-wheel alignment. At the rack, loosen the clamp bolts, rotate the link to target toe, and re-tighten the clamp bolts to specification.

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