Specfab 2015-2022 Mustang Brake Duct Backing Plates 4-Inch


Specfab Brake Duct Backing Plates 4 inch 2015 – 2022 S550 Mustang (not GT350 or Magnaride)

239.00 239.0 USD 239.00


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Specfab Brake Duct Backing 4″ Plates

Does not fit GT 350, GT 350R, 2018-2021 PP2 Models, or any model with Magnaride suspension

The Specfab design keeps the brakes at the proper temperature through smooth airflow with minimal resistance.

Brake cooling is essential for S550 Mustangs that see track use. Not only is it necessary for safety but it improves performance and reduces expenses.

Increase Performance and Brake Life

Supply a bunch air to your front rotors and keep them cool improving your braking performance and extending the life of your pads, rotors, brake fluid, and wheel bearings. The ducted backing plates supply air to the backside of the rotors where it is needed most allowing air to flow through the rotor veins lowering temperatures and maintaining braking consistency.


  • 4 inch duct size
  • TIG Welded
  • Light Weight but heavy duty aluminum alloy
  • Adjustable hardware to fit nearly any brake system

This 4 inch kit is ideal for track and dedicated S550 Mustangs race cars that are not street driven. The ducts are large for maximum airflow and steering limiters may be require to fit without tire rubbing at full steering lock.

What’s Included:

  • Two Front backing plates
  • Hose clamps
  • Hardware to install kit
  • Install instructions


  • Connection to front Fascia

If you have a street-driven car you should consider the 3 inch version of these brake ducts to avoid clearance issues.