Dayco Molded Radiator and Bypass Hose with knitted reinforcement and all-synthetic EPDM construction provides the high strength and resistance to oil, mud, salt, road debris, ozone, coolants, and temperature variations that are required for OEM hose replacements. The inner base tube is reinforced with knitted rayon for maximum strength and burst resistance for the life of the hose. In addition to meeting SAE J20R4, Class D-2 requirements, this hose meets Type EC electrochemical requirements as specified in SAE J1684.