Stock replacement fuel injector feed lines for Duramax LB7 engines. Fuel lines get rusty due to constant exposure to the elements, it is strongly recommended by OEM to replace the fuel lines after removal. BD Diesel is providing zinc plated, exact fit fuel lines to allow for corrosion resistance and easy installation. Replaces OE#s - 97188720 (2), 97188721 (2), 97188722 (2), 97188723 (2).