OBS 7.3 Powerstroke 1994-1997 Fuel System Upgrades and Parts
The stock fuel system has enough supply for the stock 7.3 OBS 90cc injectors. When you add performance modifications to the Old Body Style 1994-1997 engine to increase fuel and air then you should consider a fuel system upgrade. Larger supply pumps or even an entire fuel system will be needed to achieve more that a small performance increase. Best sellers are the 7.3 OBS complete fuel system and the 7.3 OBS fuel pump.