AEM 400LPH High Pressure Inline Fuel Pump - M18x1.5 Female Inlet to M12x1.5 Male Outlet


$152.24 $208.33
SKU: aem50-1009

AEM 400LPH High Pressure Inline Fuel Pump - M18x1.5 Female Inlet to M12x1.5 Male Outlet - aem50-1009
Description: Inline Hi Flow Fuel Pump
External Materials: Black plated steel with laser etching
Flow Rate: 400lph @ 40psi
Impeller Design: Roller vane with ceramic end plate
Inlet Fitting: M18X1.5 female
Outlet Fitting: M12x1.5 male
Outside Diameter: 60mm
PRV Activation: 150 PSI
Weight: 35.8oz

AEM’s 400lph metric high flow, high pressure inline fuel pump (PN 50-1009) is the perfect direct replacement upgrade for 044 pump users who want more fuel flow for their high performance vehicle! The 400lph metric high-flow inline fuel pump has an M18X1.5 female inlet and M12x1.5 male outlet. It utilizes the industry standard “044 Style” envelope. It is capable of supporting over 1,200 hp normally aspirated and a whopping 860 hp at 30 psi boost! It flows 400lph (105 gph) at 40 PSI, 340 lph (90 gph) at 73 PSI, and 270 lph (71 gph) at 120 PSI. Complete flow curves from 35 to 120 PSI and current draw vs. fuel pressure charts are available on the specs tab of AEM's website. The AEM 400lph metric high-flow fuel pump is rated for use with ethanol-blended fuels, (E85/E90) and all types of gasoline, but pump life will be diminished if used with 100% ethanol fuels.


  • Designed for high output naturally aspirated and forced induction EFI vehicles
  • Popular “044 Style” physical configuration with metric fittings for direct replacement of 044 pumps!
  • Maintains very high flow even at boosted fuel pressures; 340 lph @ 73 PSI (30 psi boost)
  • Each pump individually tested to flow minimum of 400lph (105gph) @ 40 PSI
  • For gasoline vehicles (pump life will be diminished when used with alcohol fuels)
  • Kit includes fuel pump, check valve fitting, terminal nuts & boots, instructions
  • Compatible with Flex Fuel (E85/E90) and all types of gasoline

Our brands