LB7 Duramax Injection Lines Complete Set 8 Fleece Performance2001 2004 LB7 Injection Lines complete set of 8 Over time LB7 Injection lines corrode and break, they are a leading cause of contamination when changing the Injectors. So if you are changing your injectors, or have a line failure we've got you covered with our all new Fleece Performance LB7 Injection Lines. Brand New No Core Charge Complete set of 8 Vehicle Fitments Chevrolet Silverado 3500 2001 to 2004 Chevrolet Silverado 2500 HD 2001 to 2005 GMC