Is your 2004.5-2007 Common Rail Cummins starting to get harder to start, especially when its cold, maybe a little white smoke, rough idle, and poor overall performance? Sounds like its time to replace your injectors. And when it comes time to do so, why not upgrade with a set that will deliver some extra power, like an extra 60 horsepower?! BD-Built Performance Premium injectors are assembled using Bosch procedures and fully calibrated and tested to ensure perfect operation. Built with new Bosch solenoids, nozzles and control valves to ensure the utmost in reliability, you'll gain power as well as dependability.