LB7 injectors are BRAND NEW from the OEM. These are the most up to date version of the previously troublesome LB7 injector. Featuring a brand new updated body that corrects cracking issues that were common in early LB7 injectors, as well as hardened chrome plated ball seats that are much more resistant to internal erosion. Second generation DTech Duramax 6.6L LB7 injectors are remanufactured and come with a new nozzle, new stator and include the latest control valve assembly with chrome control valve seat to help withstand the negative effects of fuel contamination.Use of a new stator ensures optimal injector operation and engine performance. The DDP LB7-COMPNZ Custom Injector Nozzle Set is custom made for your 2001-2004 GM 6.6L Duramax LB7. Intended for high horsepower applications, these nozzles are built to spec based on intended use and vehicle modifications. This Custom Injector Nozzle Set includes testing and balancing of your existing injector bodies.