AEM 50-1009 400LPH High Flow Inline Fuel Pump

Vehicle Fitment

• Universal application - compatible with most EFI fuel systems; installs externally or in-tank

Features

• 400 LPH (105 GPH) high-flow inline fuel pump for performance EFI applications
• Maintains high flow at elevated fuel pressures - 340 LPH @ 73 PSI and 270 LPH @ 120 PSI
• Metric "044 style" housing for widespread compatibility
• M18x1.5 female inlet and M12x1.5 male outlet for metric-fitting systems
• Supports high output naturally aspirated and forced induction engines
• Works with gasoline and ethanol-blended fuels (E85/E90); reduced life on 100% alcohol fuels
• Individually tested to ensure minimum flow performance
• Can be used externally or inside a fuel tank where space allows

Specifications

• Part Number: 50-1009
• Free Flow: ~400 LPH (105 GPH) @ 40 PSI
• Boost Flow: ~340 LPH @ 73 PSI; ~270 LPH @ 120 PSI
• Housing Diameter: ~60 mm OD
• Inlet: M18x1.5 Female
• Outlet: M12x1.5 Male
• PRV Activation: ~150 PSI
• Voltage Range: 10 V - 18 V
• Connector Terminals: 6 mm positive, 5 mm negative studs
• Current Draw: ~9.7-17.1 A depending on pressure and check valve state

Included Components

• 1x AEM 400 LPH inline high-flow fuel pump
• 1x Check valve fitting
• 2x Terminal nuts and boots
• 1x Installation instructions

Product Description

The AEM 50-1009 400 LPH High Flow Inline Fuel Pump is a universal performance fuel delivery solution engineered for high output EFI engines. With a robust 400 LPH flow rate at approximately 40 PSI, it supports high horsepower demands and maintains strong flow even at elevated fuel pressures - delivering around 340 LPH at 73 PSI and 270 LPH at 120 PSI. This makes it a strong choice for both naturally aspirated and forced induction applications requiring increased fuel supply capacity. 

Housed in the popular "044 style" metric configuration with an M18x1.5 inlet and M12x1.5 outlet, the 50-1009 fits many aftermarket systems and can be installed either externally or in-tank where space permits. Each pump is individually flow tested for quality assurance. Designed for use with gasoline and ethanol-blended fuels (E85/E90), it offers flexible use across street, race, and custom fuel system setups - though life may be reduced with 100% alcohol fuels. 

This high-flow pump includes essential hardware such as a check valve fitting, terminal nuts, and boots, plus installation instructions for ease of setup. Its universal design makes it suitable for engine builders, tuners, and racers looking to upgrade fuel delivery for high-performance EFI engines without being tied to a specific vehicle application.