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Category Archives: P7100 Fuel System

P7100 Fuel Pump Modifications for the 8 Valve 4BT

4BT Engine History and Background [caption id="attachment_11206" align="alignleft" width="224"] 4BT (3.9 L) 140 HP Engine[/caption] 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…
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