Are you looking for an engine to heater hose to increase the efficiency of your 7.3 Powerstroke 1999-2003 vehicle? Introducing the Dayco 87790 Molded Heater Hose, an uncompromising form of quality and performance that can't be matched. This heater hose is reinforced with knitted polyester and manufactured with EPDM rubber compound that meets SAE J20R4, Class D1 & SAE J1684 Specifications. Plus, thanks to its OEM location mount, it makes for simple replacement installation without a hassle. Don't let performance levels decline - get the Dayco 87790 Molded Heater Hose today for optimal engine to heater efficiency levels!