# Transit Auto KDF-100540 Disc Brake Kit for 2015-2024 Subaru WRX, Subaru Legacy, Subaru Outback - Rear

### Performance Overview

Transit Auto offers the most comprehensive and highest-quality replacement kits on the market. Thanks to our cutting-edge AI, in-house product team, and proprietary fitment data, we are able to build and deliver the most accurate kits on the market. All our kits include the highest-quality parts on the market, sourced directly by Transit and its sub-brands. Backed by over 50 years of experience and with in-house q...

### Key Features

-   Exclusive PowerGrip™ Semi-Metallic formula provides unmatched braking power (powerful friction, extreme temperature tolerance, aggressive initial bite) while maintaining low dust and noise
-   Engineered with Carbon-Enhanced PowerCast™ (G11H18/G3000) iron castings to achieve an unmatched power and braking performance (strength, grip, stability)
-   Fiber-Reinforced Multi-Layer Shim with a rubber core minimize noise, vibration, and harshness for complete quietness
-   Exclusive DS1™ Bi-Directional Drilled and Slotted for universal left or right installation
-   Engineered with High Carbon SteelRX™ alloy (Pressure Resistant, Thermal Conductive) and dipped in an Anti-Rust Black Paint to improve durability
-   Precision Cross-Drilled and Slotted for maximum cooling and heat dissipation

### Package include:

-   2x Disc Brake Rotor
-   1x Brake Pad Set

### Vehicle Fitment

**Fitment Summary:** 2015-2024 Subaru WRX, Subaru Legacy, Subaru Outback

**Position:** Rear

-   2023 Subaru WRX — Position: Rear | Note: With Electric Parking Brake
-   2016-2021 Subaru WRX — Position: Rear | Note: With Eyesight Package (Steering Responsive Fog Lights)
-   2015-2024 Subaru Legacy — Position: Rear
-   2015-2024 Subaru Outback — Position: Rear

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase. This listing includes fitment data for 2015-2024 Subaru WRX, Subaru Legacy, Subaru Outback.

**What part number is this?**  
The listed part number is KDF-100540.

**Is this product designed for direct replacement?**  
Yes. This Disc Brake Kit is intended to match compatible vehicle applications listed in the fitment section.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering.

### Common Searches

-   Disc Brake Kit for Subaru WRX
-   KDF-100540 fitment
-   Transit Auto Disc Brake Kit
-   Rear Disc Brake Kit
-   2015-2024 Subaru WRX Disc Brake Kit

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2023

Subaru

WRX

Rear

With Electric Parking Brake

2016

Subaru

WRX

Rear

With Eyesight Package (Steering Responsive Fog Lights)

2017

Subaru

WRX

Rear

With Eyesight Package (Steering Responsive Fog Lights)

2018

Subaru

WRX

Rear

With Eyesight Package (Steering Responsive Fog Lights)

2019

Subaru

WRX

Rear

With Eyesight Package (Steering Responsive Fog Lights)

2020

Subaru

WRX

Rear

With Eyesight Package (Steering Responsive Fog Lights)

2021

Subaru

WRX

Rear

With Eyesight Package (Steering Responsive Fog Lights)

2015

Subaru

Legacy

Rear

2016

Subaru

Legacy

Rear

2017

Subaru

Legacy

Rear

2018

Subaru

Legacy

Rear

2019

Subaru

Legacy

Rear

2020

Subaru

Legacy

Rear

2021

Subaru

Legacy

Rear

2022

Subaru

Legacy

Rear

2023

Subaru

Legacy

Rear

2024

Subaru

Legacy

Rear

2015

Subaru

Outback

Rear

2016

Subaru

Outback

Rear

2017

Subaru

Outback

Rear

2018

Subaru

Outback

Rear

2019

Subaru

Outback

Rear

2020

Subaru

Outback

Rear

2021

Subaru

Outback

Rear

2022

Subaru

Outback

Rear

2023

Subaru

Outback

Rear

## Details

- **Price:** 131.58 CAD
- **Vendor:** Transit Auto
- **Type:** Disc Brake Kit
- **Tags:** 2015-2024 Subaru WRX, Automotive Parts, Brake Parts, Disc Brake Kit, KDF-100540, Rear, Replacement Parts, Subaru WRX, Transit Auto, Vehicle Fitment

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 131.58 CAD | In stock |

## Images

- Transit Auto KDF-100540 Disc Brake Kit for 2015-2024 Subaru WRX, Subaru Legacy, Subaru Outback - Rear

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/transit-auto-kdf-100540-disc-brake-kit-2015-2024-subaru-wrx)
> Updated: 2026-06-02