Industrial Injection makes the finest fueling products for your Duramax! These nozzles are made using the latest extrude hone and EDM processes on the market. These R3 series nozzles will reliably add 40% more flow than your factory injectors. The reason Industrial lists their injectors in percentages, is because horsepower gains vary a lot depending on other fuel system modifications.
These Injectors require the use of a modified CP3 injection pump, such as the Dragon Fire series.