AEM's 400LPH high-flow fuel pumps are built for high-performance naturally aspirated and forced induction EFI vehicles. Each pump is individually flow tested and guaranteed to deliver 400+ LPH (106 GPH) at 40 PSI (13.5V) - enough to support 1000+ horsepower on gasoline - and maintains 330+ LPH at 70 PSI (13.5V), good for roughly 870 HP on gasoline. With a compact 39mm body (the same size as a Walbro 255), low amperage draw, an 11mm inlet, and a 9mm barbed outlet, this pump is designed to replace the OEM fuel pump in many applications. The 50-1235 uses a smooth barbed outlet compatible with 5/16-inch ID hose. The kit includes a wiring harness, pre-filter, end cap, and rubber buffer sleeve. Factory fuel pump wiring may not be adequate to handle the current draw of this pump; refer to the electrical requirements section of the installation instructions for proper wiring. This pump does not include an integrated check valve.
Specifications:
- Flow Rate: 400+ LPH (106 GPH) at 40 PSI, 13.5V
- High-Pressure Flow: 330+ LPH at 70 PSI, 13.5V
- Body Diameter: 39mm (same size as Walbro 255)
- Inlet: 11mm
- Outlet: 9mm smooth barb, sized for 5/16 inch ID hose
- Current Draw: 12A at 40 PSI / 15A at 70 PSI
- Fuel Compatibility: Pump/race gasoline, ethanol up to E100, methanol up to M100
- Includes: Wiring harness, pre-filter, end cap, rubber buffer sleeve
- Check Valve: Not included
- Part Number: 50-1235
FAQ
Does the AEM 50-1235 fuel pump include a check valve?
No, this pump does not include an integrated check valve.
What size hose does the AEM 50-1235 outlet fit?
Its smooth single-barb outlet is compatible with 5/16-inch ID fuel hose.
Is special wiring needed for the AEM 400 LPH fuel pump?
Yes. Factory fuel pump wiring may not be adequate for the current draw of this pump; the installation instructions include the electrical requirements needed for proper wiring.

