APR Carbon Fiber Brake Cooling Kit for 2018+ STi (CF-818658) Select::Cooling Ducts Only (CF-801850) 5048-2600 (Stage 3)

5048-2600 (Stage 3)

30-3517 includes a Wideband O2 connector

Both versions have about the same pedal feel

Subaru TF690

APR Carbon Fiber Brake Cooling Kit for 2018+ STi (CF-818658) Select::Cooling Ducts Only (CF-801850) 5048-2600 (Stage 3)APR carbon fiber brake cooling duct kit for 2018 2021 Subaru STi enhances airflow and ensures efficient brake cooling and heat dispersion on the track. Vehicle Fitment: 2018 2021 Subaru STi Note this does not fit WRX More Info from APR: The APR Brake Cooling Ducts are aerodynamically optimized to "funnel in" massive amounts of air. Also known as the venturi effect, when the vehicle speed increases, this funneled in air increases in both pressure and