Choose options
AEM’s 400LPH High Flow In-Tank Fuel Pump is engineered for high-performance EFI applications, supporting both naturally aspirated and forced induction engines. With a compact 39mm body and double barbed outlet for secure hose fitment, this pump is an ideal upgrade for vehicles requiring higher fuel delivery on gasoline, E85, or methanol blends. Capable of supporting over 1000HP* on petrol and tested for consistent performance under boost, it’s one of the most powerful 39mm in-tank fuel pumps available.
Key Features
-
Flows 400+ LPH at 40 PSI (13.5V); supports 1000+ HP on petrol*
-
Maintains 330+ LPH at 70 PSI (13.5V); supports ~870 HP on petrol*
-
Compact 39mm body fits many OEM fuel pump hangers
-
E85 and M100 compatible – safe for ethanol and methanol
-
Double barbed 9mm outlet ideal for 3/8” ID hose
-
Low current draw: 12A @ 40 PSI, 15A @ 70 PSI
-
Includes wiring harness, pre-filter, end cap and rubber buffer sleeve
-
Individually flow tested and quality assured
Important Notes
-
Not compatible with integrated check valve systems
-
May require upgraded wiring to support current draw—see installation manual for guidance
-
For 5/16” hose compatibility, see SKU 50-1235 (smooth barb version)
Included
-
AEM 400LPH Fuel Pump (Double Barb)
-
Wiring harness
-
Pre-filter
-
End cap
-
Rubber sleeve
No instructions available for this product.

Need Help Finding the Right Part?
We’ll Track It Down for You
We know how frustrating it can be searching for the right part. If it’s not listed on our site, that doesn’t mean we can’t source it.
Fill out the quick form below and our team will track it down for you.