EBC S1KR1522 Rear Brake Kit for 2008-2017 Subaru WRX STI 2.5L AWD

Vehicle Fitment

• 2008-2014 Subaru Impreza (WRX, WRX STI, 2.5i, Outback Sport; 2.5L H4 EJ25, AWD)
• 2015-2017 Subaru WRX STI (Base, Launch Edition, Limited, Series.HyperBlue; 2.5L H4 EJ257, AWD)
• Fitment confirmed through 2017. 2025 coverage unconfirmed at time of listing.

Features

• Includes EBC Ultimax² aramid fiber brake pads with patented Brake-In coating
• RK Series smooth rear rotors offer OEM-style braking and corrosion protection
• Thermic black anti-rust coating for long-lasting durability
• Low dust, low noise compound engineered for daily street use
• Balanced and run-out tested rotors for smooth, vibration-free braking
• Direct bolt-on replacement with factory specs - no modifications required
• Pads feature high friction performance right out of the box
• Engineered and manufactured to British quality standards

Specifications

• Position: Rear axle
• Rotor diameter: 316 mm
• Rotor thickness (new): 20 mm
• Minimum rotor thickness: 18 mm
• Bolt pattern: 5-lug
• Center bore: 58 mm
• Drivetrain: AWD only
• Brake pad type: FMSI D961 (Ultimax² aramid compound)

Included Components

• 2x Rear RK Series brake rotors (316 mm)
• 2x Sets of rear EBC Ultimax² brake pads
• 1x Tube of caliper slide lubricant

Product Description

The EBC S1KR1522 rear brake kit is a complete, high-quality replacement solution for Subaru WRX STI and select Impreza models with 2.5L turbo engines and AWD. Designed for daily-driven performance, this kit includes smooth-finish RK Series rotors and low-dust Ultimax² brake pads. The patented Brake-In coating ensures the pads bed-in quickly, providing consistent and confident stopping power after only a few miles.

Ideal for street use, this rear brake package offers direct OEM-style fitment without any modifications. The rotors come pre-coated with Thermic black anti-rust protection and are machined for true balance and minimum run-out. Backed by EBC's industry-leading quality standards, this kit is a reliable, no-hassle upgrade for restoring rear braking performance. Fitment is confirmed through model year 2017; 2025 coverage remains unverified at time of listing.