Category Archives: P7100 Fuel System

4BT Engine History and Background 4BT (3.9 L) 140 HP Engine The Cummins 4BT has mostly been utilized in applications such as box trucks, small industrial vehicles and agricultural equipment. The 4BT is pretty much just a downsized version of the famous 5.9L 12V Cummins as these engines share almost all of their parts such…