Deatschwerks DW400 415lph In-Tank Fuel Pump for Mazda MX-5 NA NB


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Deatschwerks DW400 415lph In-Tank Fuel Pump for Mazda MX-5 NA NB

The highest Flowing In-Tank fuel pump on the market! Treat your trusty Mazda MX-5 to a new fuel pump that will allow you to push some massive HP numbers


  • 500 LPH at 0psi
  • 415 LPH at 40psi
  • 350LPH at 80psi

Deatschwerks say this pump can support up to more than 1,000 HP on petrol and 750 HP on e85

  •  5% at 40psi
  • 18% at 70psi
  • 56% at 100psi


  • Made in Germany through collaboration with Bosch Aftermarket
  • Exceeds specifications of SAEJ1537
  • Compatible with pump gas, e85, and race fuels
  • Carbon commutators and brushes, fully encapsulated machine balanced armature, composite turbine impeller.


  • 3-yr DW comprehensive warranty and technical support
  • 46mm diameter is 16% smaller footprint than Walbro450
  • Compatible with pulse width modulated pump controllers
  • Universal fitment kit included (filter, wiring harness, hose, and clamps)

Additional Considerations

1. 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.

2. 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.

3. Universal Fitment – Unlike other DW in-tank pumps, The DW400 is not an application-specific fitment pump.

4. 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.

Weight 1.1 kg
Dimensions 16 × 11 × 6 cm



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