Continental Elite Blue Xtreme High-Performance Hose kits include a variety of upper and lower radiator hoses, by-pass hoses, and heater hoses with Nomex reinforcement. Blue Xtreme is a high, heat-resistant hose designed to provide superior performance over standard coolant hoses. Blue Xtreme hoses give a custom look under the hood while providing miles of worry-free service. SAE 20R3 Class D3, SAE 20R4 Class D3 specifications. Kit contents: (61331HT) Upper Radiator Hose w/TPI; (63083HT) Formed Heater Hose; (61564HT) Upper Radiator Hose w/o TPI; (63085HT) Formed Heater Hose (2Pcs); (61196HT) Lower Radiator Hose; 5/8" x 6" Straight Heater Hose; (63075HT) Formed Heater Hose; 3/4" x 4' Straight Heater Hose.