The 6.7 L Cummins is the latest in the B-series engines, introduced mid year in 2007. Rated at 350 HP & 650 lb-ft, it is also the most powerful B-series ever offered. The 5.9 ISB was replaced by the 6.7 to meet strict new diesel emission requirements. To meet such requirements, the 6.7 is equipped with an EGR (exhaust gas recirculation) system, a variable geometry turbocharger (VGT), and a diesel particulate filter designed to reduce diesel particulate matter by more than 90 percent. A new, higher-pressure version of the Bosch direct injection system is used.