EBC S9KR1517 Rear Yellowstuff USR Brake Kit 15-21 Subaru WRX VA AWD

Vehicle Fitment

• 2015-2021 Subaru WRX (VA chassis, 2.0L Turbo, AWD)
• 2015-2022 Subaru WRX (Base / Premium / Limited / GT trims where equipped, VA chassis)

Fitment Notes

• Rear axle brake kit only (not compatible with front axle)
• Designed specifically for Subaru VA WRX rear solid rotor setup
• Not compatible with earlier GD (2002-2007) WRX/STI platforms
• May vary slightly by rear brake option package depending on trim level

Features

• EBC Yellowstuff high-friction performance brake pad compound
• USR fine slotted rotors for improved heat and gas dispersion
• Geomet anti-corrosion coated rotor finish for rust resistance
• Direct-fit OEM replacement design for VA WRX rear brakes
• Improved braking bite under cold and high-temperature conditions
• Reduced brake fade during repeated high-speed braking
• Balanced rotor machining for smooth pedal feel
• Chamfered and shimmed pads to reduce noise and vibration

Specifications

• Part Number: S9KR1517
• Position: Rear axle
• Rotor Diameter: ~285-285.5 mm
• Rotor Type: Solid USR slotted rear rotor
• Pad Compound: EBC Yellowstuff aramid fiber
• Drivetrain: AWD
• Platform: Subaru VA WRX chassis
• Wheel Lug Pattern: 5-lug

Included Components

• 1x Set EBC Yellowstuff rear brake pads
• 2x EBC USR slotted rear rotors (285 mm class)
• 1x Brake installation hardware/lube kit (if included in EBC packaging)

Product Description

The EBC S9KR1517 is a rear axle performance brake kit designed for Subaru WRX models built on the VA chassis from 2015 onward. It combines EBC's Yellowstuff high-friction brake pads with USR slotted rotors to deliver stronger braking response, improved heat management, and better fade resistance compared to standard OEM rear braking components.

This kit is intended for drivers who want a noticeable upgrade in braking performance for spirited street driving or occasional track use. The slotted rotor design helps maintain a cleaner pad surface by removing dust, gases, and debris, while also improving cooling efficiency during repeated braking events. The Yellowstuff compound provides strong initial bite and consistent performance across a wide temperature range.

As a direct-fit replacement for the VA WRX rear brake system, installation is straightforward with no modifications required. For optimal balance and braking stability, this rear kit is best paired with a compatible front brake upgrade from the same performance line.