2001-2004 LB7 Duramax Seal Kit (O-Ring & Copper Gasket) (Set of 8)

Are you removing the injectors and don't want to reuse the seals? You are making the right choice. Replacing the injector seals is cheap insurance that you won't have an issue when you get the truck back together. Removing and reassembling LB7 injectors takes a long time, it's best not to risk doing it twice.