Silicone SAE J20R1 Class A radiator and coolant hose are rigid hoses used for routing mostly straight coolant and radiator lines in performance motors and vehicles, marine wet-exhaust systems, commercial truck and bus induction and cooling systems, agriculture and off-highway vehicles, and turbo-diesel vehicles. The hoses are convoluted inside and out and will not collapse under full vacuum. They are made from silicone, which provides excellent resistance to high temperatures, ozone, and UV rays. They also resist electrochemical degradation. These silicone hoses meet SAE (Society of Automotive Engineers) Standard J20R1 and have Class A high-temperature resistance.
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