Restore performance in your 2001-2004 GM 6.6L Duramax LB7 with the Bostech DE651 Silver Series Remanufactured Fuel Injector. Bostech Silver Series LB7 Fuel Injectors are 100% disassembled, then each component is inspected, polished, and certified to original specifications. All Mating surfaces are lapped to a precision finish, and then assembled and tested to OE quality and performance. New Seals and o-rings are also installed before packaging. Injectors sold individually.