PowerStop Z23-2118 Carbon-Fiber Ceramic Rear Brake Pads for 18-21 Subaru WRX STI

Vehicle Fitment

• 2018-2021 Subaru WRX STI (Sedan, 2.5L Turbo H4, AWD) - rear only
• 2024 Subaru WRX TR (Sedan, 2.4L Turbo H4, AWD) - rear only (fitment confirmed by official specs)

Features

• Carbon-fiber ceramic friction material for superior stopping power
• Low-dust formulation keeps wheels cleaner
• Positive-mold design for consistent wear and performance
• Thermally-scorched surface for faster break-in
• Chamfered and slotted pad faces for quieter braking
• Powder-coated backing plates resist rust and corrosion
• Includes stainless steel hardware for easier installation
• Bolt-on upgrade compatible with stock calipers and rotors

Specifications

• Material: Carbon Fiber Ceramic
• Inner pad thickness: 14.8 mm
• Outer pad thickness: 14.8 mm
• Weight: Approx. 4.1 lbs per set
• Position: Rear axle only (left & right)
• Compatible with OEM, slotted, or cross-drilled rotors

Included Components

• 1x Set of rear brake pads (left + right)
• 1x Stainless steel hardware kit (pins, shims, bushings)
• 1x Ceramic brake lubricant

Product Description

The PowerStop Z23-2118 rear brake pad kit is designed for Subaru WRX STI enthusiasts who demand superior braking performance. The carbon-fiber ceramic material provides enhanced fade resistance and reduced dust compared to standard OEM pads, ensuring a cleaner and quieter driving experience.

Installation is straightforward, using existing rear calipers and rotors without modifications. This rear pad kit is ideal for spirited driving, track days, or daily performance use, offering consistent braking performance under high temperatures and repeated stops.

Fitment is confirmed through 2021 for the WRX STI and includes the 2024 WRX TR. Fitment for 2025 is unconfirmed at the time of listing. Note that this kit covers the rear axle only; pairing with front pads and rotors is recommended for complete brake system upgrades.