Spool Performance B58 Gen2 Stage 4 FX400X Upgraded High Pressure Fuel Pump

Spool Performance is proud to introduce our flag-ship 350 bar high-pressure fuel pump capable of delivering fuel at 350 bar/ 35Mpa/ 5000psi. The FX400X improves on our existing industry leading FX350 by about 20% across the entire delivery range.

The FX400X coupled with our IFX350 Gen2 DI injectors is a true revolution and the key to DI only high horsepower numbers on the Gen2 BMW high-pressure fuel system.

The FX400X is truly Plug and Play for all platforms we are offering and comes with all the lines and hardware needed for a clean easy install.

As usual, we stand behind our high quality offerings and this product is eligible for our lifetime warranty program.

Tuning changes are required to run the fuel pump and we’re in the process of adding these to the different flashing platforms. Meanwhile our team can assist with adding the required changes to tune files.

Fueling Capabilities with HPFP + IFX350X Gen2 injectors:

Gasoline           1100whp

E50 Mix             900whp

E85                     800whp  

Fueling Capabilities with HPFP + IFX150 Gen2 injectors+ Spool Cam lift Mod:

Gasoline           1200whp

E50 Mix             1050whp

E85                     900whp  

What’s included:

Spool Performance FX400X High Pressure Fuel Pump

Mounting Bracket

Pump alignment tool

Triple Layer Low Pressure Line [Nylon over Stainless steel over PTFE]

Plug and Play HPFP Adapter Harness

Note: Proper low pressure fueling is critical to proper normal functioning of the HPFP. Although our pumps are covered by our lifetime warranty program as usual, any damage due to cavitation induced damages to the piston/bore would be excluded from coverage. Please make sure you are running an upgraded low pressure fuel pump to ensure adequate pressure delivery to the FX400X pump.