 Changes to the engines included a new turbocharger (called 
EVRT, for "Electronic Variable Response Turbocharger") with movable turbo vanes to improve boost and reduce lag, a 
new, electronically controlled hydraulic unit fuel injection system, cooled Exhaust Gas Recirculation to reduce 
emissions, and new four-valve cylinder heads.In 2007, the DT engines were updated once again to comply with stricter 2007 emissions standards.The DT 466, DT 570, and HT 570 
engines will be renamed MaxxForce DT, MaxxForce 9, and MaxxForce 10, respectively.