The Gates Racing WRX & STi Radiator Hose Kit features high quality construction utilizing a specially formulated rubber. These radiator hoses are constructed of electro-chemically resistant tube structure. which helps combat hose failure. It protects against the high temperatures of full throttle driving, and Prolongs the effectiveness of coolant. it's 10 to 15 times more resistant to water permeation than silicone hose. The Gates Racing hoses are also designed to withstand temperatures up to 400 degrees Fahrenheit. The Gates Racing brand name carries a strong reputation for quality and dependability. This radiator hose kit will provide you with long service life in even the most extreme conditions. The radiator hose kit only comes in blue.