EBC Ultimax Slotted Rear Brake Rotors RK7777 for 2015-2018 Subaru WRX

Upgrade the braking performance of your 2015-2018 Subaru WRX with the EBC Ultimax Slotted Rear Brake Rotors, part number RK7777. Designed as an OE-style disc set, these vented rotors provide dependable braking performance while maintaining a quiet operation. The progressively angled slots help reduce the air noise often associated with slotted brake rotors, making them well suited for daily driving and performance-focused applications.
The angled slots draw in cool air to help manage brake temperatures during repeated braking. They also help evacuate brake dust, debris, and gases from the pad and rotor interface, supporting consistent pad contact and reliable stopping performance. By keeping the friction surfaces cleaner, the slot design may also help promote even pad wear and extend pad service life.
This rear rotor set features five bolt holes and is designed for applications using FMSI pad number D1114. Each rotor has a 10 mm thickness, a 58 mm center hole diameter, a 63.6 mm height, and a 285.5 mm diameter. Verify vehicle specifications and brake pad compatibility before installation. The EBC RK7777 Ultimax kit is a direct-fit-style replacement intended to restore braking confidence without unnecessary noise or aggressive rotor styling.

• Ultimax OE Style Disc Kit


• Designed for the rear brakes of select 2015-2018 Subaru WRX models


• Progressively angled slots support cooling and debris removal


• Quiet slotted operation with reduced air noise


• Vented construction with five bolt holes

Features:

• Brand: EBC

• Part Number: RK7777

• Application: Rear brake rotors for select 2015-2018 Subaru WRX models

• Rotor Style: Ultimax OE-style slotted disc

• Construction: Vented

• Pad Compatibility: FMSI pad number D1114

• Slot Design: Progressively angled slots help draw in cool air and clear dust and debris

• Operation: Reduced air noise compared with conventional slotted rotors

• Bolt Pattern: Five bolt holes

• Rotor Diameter: 285.5 mm

• Rotor Thickness: 10 mm

• Center Hole Diameter: 58 mm

• Rotor Height: 63.6 mm