Dynomite Diesel Performance Injector Nozzles offer precise delivery of fuel with an optimal spray pattern to help you make more power and burn less fuel. Sold as complete sets, they come with items needed for installation like new copper washer and an injector hold-down tool. Dynomite Diesel recommends that all nozzles should be installed and the injectors calibrated by a professional shop that is familiar with calibrating over-sized injectors.  They are offered in a variety of flow rates and horsepower increases.