Rear disc brake kit for Ford Mustang 2015-2023 by SSBC-USA, featuring black DS rotors and R1-Redline design.
Ford Mustang rear disc brake kit with black DS rotors, SSBC-USA R1-Redline series, includes rear calipers and mounting hardware.
Ford Mustang rear disc brake kit with black DS rotors, SSBC-USA R1-Redline model for 2015–2023 models, including calipers and hardware.
Ford Mustang 2015-2023 rear disc brake kit with black DS rotors and SSBC-USA branding, shown installed on the rear wheel.

2015–2023 Ford Mustang R1-Redline Rear Disc Brake Kit with DS Rotors – Black – A551-21BLK-DS

SKU- A551-21BLK-DS

Regular price $1,835.00
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Shipping calculated at checkout.

Upgrade your 2015–2023 Ford Mustang rear brakes with an SSBC-USA R1-Redline rear disc brake kit featuring billet aluminum calipers in a black finish and dimple-drilled and slotted rotors.

  • Fits select 2015–2023 Ford Mustang applications
  • Includes R1-Redline rear calipers, DS rotors, brake pads, hoses, brackets, and installation hardware
  • Designed for stronger street performance, improved brake balance, and a clean custom appearance
  • Calipers are 100% Made in the USA by SSBC-USA

Verify axle configuration, parking-brake compatibility, wheel clearance, and application fitment before ordering.

✔ Fitment Confidence: Not sure whether this product is correct for your vehicle or current brake setup? Call our tech team at (716) 775-6700 before ordering so we can help confirm the correct application.

🚚 Shipping: This item is configured to order at our Elma, NY facility — production and configuration typically take 5–10 business days. Supply constraints can occasionally cause temporary delays beyond this window. Need an update on your order? Contact us at (716) 775-6700 or orders@ssbc-usa.com with your order number and we'll get you an answer right away. Your exact shipping cost is calculated at checkout based on your address.

Frequently Asked Questions

How do I confirm this brake kit fits my vehicle?

Review the fitment details and Fitment Confidence section above. Model year, drivetrain, axle or hub configuration, rotor dimensions, parking-brake style, and wheel clearance can affect fitment. If any part of your setup is uncertain, call the SSBC-USA technical team at (716) 775-6700 before ordering.

What is included with this kit?

Use the Product Details, Key Features, or What's Included information above for the exact components supplied with this part number. Package contents vary by application and configuration.

Should wheel clearance be checked before ordering?

Yes. Brake-kit clearance depends on the specific wheel diameter, spoke profile, and offset. Confirm the clearance requirements for your application before ordering.

How long does this product take to ship?

This product is configured to order at the SSBC-USA facility in Elma, New York. Production and configuration typically take 5–10 business days, although temporary supply constraints can occasionally extend that timeframe.

Frequently Asked Questions

How do I confirm this product fits my vehicle or brake system?

Review the fitment information on this page and confirm your year, make, model, drivetrain, wheel clearance, and current brake configuration where applicable. If you are unsure, call SSBC-USA technical support at (716) 775-6700 before ordering.

What is included with this product?

The included components are listed in the product description above. If a component is not specifically listed or you need help identifying what is required for your application, call SSBC-USA at (716) 775-6700.

How long will this product take to ship?

This item is configured to order at our Elma, New York facility. Production and configuration typically take 5–10 business days, although supply constraints can occasionally cause additional delays. Exact shipping cost is calculated at checkout.

Where can I get technical or order support?

Call SSBC-USA at (716) 775-6700 or email orders@ssbc-usa.com. Please include your product or order number when available.