If you're looking at the Cummins 4BT and 6BT engines ... In 1998 the engine grew from 12 valves to 24 and its name was changed from 6BT to ISB. If you're comfortable with modifications, you ...
Cummins Inc. (NYSE: CMI) and Liberty Energy Inc. (NYSE: LBRT) (“Liberty”) today announced that the industry’s first natural gas variable speed, large displacement engine to power Liberty’s ...