J's Racing Radiator Hoses are constructed with 3 ply polyester silicone and designed to withstand temperatures of 180°C and pressure of 4kg / cm. Excellent quality has repeatedly been proven on the world's race and rally scenes. Stock rubber hoses are known for deterioration (cracking, ripping, and leaking) and may cause other components to fail. A simple replacement hose for long lasting durability and eliminates many other possible problems.