Cobb Silicone Radiator Hose Kit – Subaru WRX / STI (B22400-BK)

The COBB Silicone Radiator Hose Kit (B22400-BK) is a high-performance cooling upgrade designed for 2008–2014 Subaru WRX and 2008–2021 Subaru STI models. These hoses replace the factory rubber radiator hoses with multi-ply silicone construction for improved durability, heat resistance, and reliability under high-temperature and high-pressure conditions.

Finished in black, the COBB B22400-BK radiator hose kit provides OEM-style fitment with enhanced strength, making it ideal for both daily-driven and performance-oriented vehicles.

Key Features

• Multi-ply silicone radiator hoses

• Improved resistance to heat, pressure, and coolant degradation

• More durable than factory rubber hoses

• Black finish for a clean, OEM-style appearance

• Direct replacement with factory-style fitment

Vehicle Fitment

• 2008–2014 Subaru WRX

• 2008–2021 Subaru STI

Notes

• Hose kit only; clamps included where applicable

• Professional installation recommended