They include the latest updates and improvements over the old style LB7's. New technology (08/14) uses DLC coating. DLC Coating stands for diamond-like carbon coating, that has unique properties of natural diamond low friction, high hardness, and high corrosion resistance. These stock replacement injectors will assure you high performance and long operating life. Features: New Corrosion Resistant Chrome Ball and Seat Updated Crack Resistant Bodies New Solenoids New High Pressure Fitting New Nozzles DLC Coated Needle Guide and Seat.We include the Injector Seal Kit FREE of charge. (Copper Washers, O-rings and Return Line Seals). When shopping for any of your fuel system needs, check us out at Lincoln Diesel Specialties for the BEST customer service/prices in the industry! The item "2001-2004 LB7 Duramax 6.6L OEM Bosch Fuel Injectors 2500HD 3500HD Chevy GMC GM" is in sale since Tuesday, April 30, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Air Intake & Fuel Delivery\Fuel Injectors". The seller is "lincolndieselspecialties" and is located in Redgranite, Wisconsin. This item can be shipped worldwide.