Samco upper and lower radiator hoses is a high performance replacement silicone radiator hoses for the S13 and S14 240SX w/ SR20DET. The Samco radiator hoses are a direct replacement for your SR20DET engine. The stock hoses gets weak and brittle over time which can lead to collapsing and leak at high temperature operation. A failure in the cooling system can lead to serious engine damage.