Cummins Westport Inc. (CWI) has unveiled the ISB6.7 G, a 6.7 liter medium-duty, factory built dedicated natural gas engine for school bus, shuttle bus, medium duty truck and vocational applications at the opening reception of ACT Expo in Dallas TX. The new ISB6.7 G is currently in field trials with full … Continue reading New CWI Mid-Range ISB6.7 Natural Gas Engine Unveiled