PDR carries Dyno-mite Diesel Performance injectors for your Duramax Diesel. We have modified injector nozzles for 2001-2006 LB7, LLY and LBZ Duramax engines. All horsepower levels are approximate increases compared to stock injectors. Other fuel and air flow modifications can effect your expected power increases. All our performance injectors are sold as a matched and balanced set. If you need a complete injector, we have stock replacement injectors too.