Gates HK8RB Blue Racing Hose Kit Durable nylon fiber provides extra wear resistance, doubling tooth strength Kit contains 1-Upper radiator hose (22925 - 10.9 inch centerline length, 1.31 inch inner diameter) and 1-Lower radiator hose (22320 - 13.3 inch centerline length, 1.31 inch inner diameter) Protects against the high temperatures of full throttle driving Combats the leading cause of premature hose failure - electrochemical degradation (ECD) High saturation HNBR elastomeric composites contribute to the exceptional durability and heat resistance with aramid reinforcement