DeatschWerks DW400 Universal In-Tank Fuel Pump - 415LPH (9-401-1001)

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DW400 Universal In-Tank Fuel Pump by DeatschWerks (9-401-1001)

DeatschWerks in-tank fuel pumps are manufactured with a quiet and reliable turbine impeller which is compatible with pulse width modulated pump drivers. These pumps are also built with carbon commutators and fully encapsulated armatures for ethanol compatibility.

DW’s high-torque motors maintain flow at higher pressure better than competitors’ pumps. Low amperage draw minimizes pump temperatures, maximizes pump life and reduces stress on OE wiring. Universal fitment kits include filter, electrical connector, and other accessories to help with installation. All DW fuel pumps are backed by a 3-year no fault warranty.

DW400 Fuel Pump Features

  • Turbine Impeller Compatible w/ Pulse Width Modulated Pump Drivers
  • Built With Carbon Commutators and Fully Encapsulated Armatures (Ethanol Compatible)
  • High-Torque Motors with a Low Amperage Draw
  • Minimizes Temperatures, Maximizes Lifespan and Reduces Stress
  • Includes a Universal Fitment Kit

Additional Considerations

  • Wiring – A 400+ LPH pump draws substantial current (16-20 amps at typical operating pressures). Make sure your chassis wiring is up to the task of delivering this much current. A DW hardwire kit (part number FPHWK) is an inexpensive insurance policy.
  • Size – The DW400 is a 46mm diameter pump. Standard in-tank pumps are 39mm diameter. Modifications to the fuel pump module will be necessary on some applications.
  • Universal Fitment – Unlike other DW in-tank pumps, The DW400 is not an application-specific fitment pump.
  • Check-Valve – the DW400 does not have in internal check valve. An in-line check valve may be necessary for easy engine starts in some applications.


  • Universal

What's In The Box?

  • 1 - DW400 Fuel Pump
  • 1 - Universal Install Kit
  • Warranty Information



  • DeatschWerks 3-Year No Fault Warranty

Customer Reviews

Based on 3 reviews
Renaldo Thomas
Quality Product

Pump does very well..holds the pressure right to red line. Flows very well.

John Healy
I should have bought one a long time ago!

I am more than impressed with this pump! I was running a dual walboro 450 setup with port injection on my N54 using a hobbswitch to activate the second pump, but I ended up pulling them both out and replacing them with the DW400 to eliminate the need for a hobbswitch.. Worked like a charm with 0 issues! It’s been supporting my 600hp on straight E85 like a champ!! On ONE pump!!!

Walks all over walbro 450

Quieter and way more powerful that Walbro 450. The pump is currently in a surge tank right behind the rear seats in an EVO X. The overall sound output is slightly less than the wally 450 but it has a lower pitch to it which makes it infinitely less annoying. Like the wally 450, it takes a couple of days of running to break in the brushes and produce max flow. During this time, it becomes a little louder(when it was brand new I could hardly hear it at all). Flow under boost pressure is night and day compared to the 450. Injector duty cycle went from 80% to 50%. This pump saved me thousands due to not having to upgrade my entire pump setup to brushless or dual pumps. Hopefully it lasts.