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 fitler designed to reduce diesel particulate matter by more than 90 percent. A new, higher-pressure version of the Bosch direct injection system is used.
409 cubic inches, 6.7 liters
Inline 6 cylinder
Variable geometry turbocharger
OHV, 4 valves per cylinder, solid lifter camshaft
Direct injection: Electronically controlled Bosch high pressure common rail; 26,000 psi max.
350 HP @ 3,013 RPM (intro) 350 HP @ 3,013 RPM (Feb. 2011 upgrade)
650 lb-ft @ 1,500 RPM w/auto trans (intro) 610 lb-ft @ 1,500 RPM w/manual trans (2010) 800 lb-ft @ 1,600 RPM (Announced Spring 2011)