Fuel Injection Pump For Cummins 6LTAA 8.9 375 HP Diesel Engine 5258154 4944057. Package included: Fuel Injection Pump. For Cummins 6LTAA 8.9 375 HP Diesel Engine. Installation guide NOT included, professional skills required during the installation, we highly recommend asking repair shop for help. Due to different displays and light variations, all pictures shown may not reflect the actual color or condition of the item. Economy: 15-60 days. Standard: 10-35 days. Expedited: 4-7 days.