Keeping your Subaru WRX and STI engine bay dressed up is just about as important as having the engine running cool. These silicone radiator hoses are designed to add powerful style to your engine bay in blue or red. This silicone hose kit is much more durable then your factory rubber hoses and will last the life of your car. Factory rubber hose crack and deteriorate over time. These radiator hoses will keep your coolant flowing properly and the engine temps down as they are thicker and insulate better then the factory ones. In addition, all Agency Power silicone hoses include new hose clamps for a secure and easy fit instead of the factory clamps. Hoses work with factory or aftermarket radiators.