Carbon Fiber Subaru STI Brake Cooling Kit 2018-2021

STI Only.

The Carbon Fiber Subaru STI Brake Cooling Kit (2018–2021) by APR Performance is engineered to maximize brake cooling efficiency and prevent heat-induced fade during high-performance driving.

Using aerodynamic optimization, these carbon fiber brake cooling ducts apply the venturi effect to accelerate airflow through the duct system. As vehicle speed increases, air is funneled from a wide inlet to a narrower outlet, boosting air pressure and velocity for consistent brake rotor cooling lap after lap.

Constructed from pre-preg carbon fiber reinforced polymer (CFRP), the ducts deliver a superior strength-to-weight ratio while maintaining resistance to extreme heat and environmental conditions. Each kit is finished in a UV-resistant clear coat, ensuring long-term durability and a high-end visual appeal that complements the STI’s aggressive design.

When paired with high-temperature brake duct hoses (sold separately), this system effectively reduces brake fade, extends component life, and enhances braking consistency during demanding street or track sessions.

Key Features

• Pre-Preg Carbon Fiber Construction – Autoclave-formed for exceptional strength and lightweight performance.
• Venturi-Optimized Design – Funnels air through a narrow channel to accelerate pressure and improve cooling.
• Enhanced Brake Longevity – Reduces rotor and pad temperatures during extended track use.
• UV Resistant Coating – Protects against environmental damage and fading over time.
• High-Performance Fitment – Precision-engineered for Subaru STI (2018–2021).
• Race-Ready Durability – Built to withstand high thermal stress in performance environments.

Specifications

• Material: Pre-Preg Carbon Fiber Reinforced Polymer (CFRP)
• Finish: UV-Stable Gloss Clear Coat
• Construction: Autoclave-Cured Carbon Fiber
• Installation: Direct Fit (uses factory mounting points)
• Includes: Carbon Fiber Cooling Ducts (Hoses not included)
• Brand: APR Performance
• Category: Cooling / Aerodynamics

Fitment

• Subaru WRX STI 2018–2021