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Max Power Motosports

Spool Stage 4 FX400X Upgraded High Pressure Fuel Pump [B58 Gen 2]

Spool Stage 4 FX400X Upgraded High Pressure Fuel Pump [B58 Gen 2]

Regular price $3,123.75
Regular price $3,123.75 Sale price
SAVE Liquid error (snippets/price line 116): Computation results in '-Infinity'% Sold out

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Spool Stage 4 FX400X Upgraded High Pressure Fuel Pump [B58 Gen 2]

Spool Stage 4 FX400X Upgraded High Pressure Fuel Pump [B58 Gen 2]

Regular price $3,123.75
Regular price $3,123.75 Sale price
SAVE Liquid error (snippets/price line 116): Computation results in '-Infinity'% Sold out
View full details

THIS PRODUCT IS CURRENTLY ON BACKORDER. CONTACT US AT CUSTOMER_SERVICE@SPOOLPERFORMANCE.US IF YOU HAVE ANY QUESTIONS.

 

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.

 

Shipping: Free fast shipping. Orders are processed in 1-2 business days.

Returns: 30-day returns on unused items in original packaging.

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Customer reviews

Don't believe us? Take their word for it.

4.80 out of 5

Based on 81 reviews

74
4
0
0
3
09/30/2026
David JamesVerified
David James

Perfect fit for my RAM

Installed both filters on my 2011 RAM 3500 6.7L Cummins and everything fit properly. Nice having both filters in one kit instead of ordering separately.

09/30/2026
Karl WilliamVerified
Karl William

Good quality replacement kit

The filters arrived well packed and matched what I needed for my truck. Installation was straightforward and the quality feels solid.

09/30/2026
Mr Patts ClarkVerified
Mr Patts Clark

Convenient and worth it

This kit made the service much easier. Both the oil and fuel filter came together, which saved me from searching for each part individually.

David BVerified

MaxPower Motorsports vs. Motorcraft

I can only speak to the MaxPower Motorsports's oil filter from a visual perspective because I haven't installed any yet. The only difference is that the MaxPower Motorsports's filter is about a 1/4" shorter than the

Waltman SmithVerified

Happy and satisfied

Quick and easy order will be back to do it again

Rob wiseriabkerVerified

Awesome C/S

I've bought from them like 3–4 times every thing fits good. Had an issue w/something being damaged in shipping they sent brand new one. AA+ customer service

Captain TangoVerified

Good affordable quality product

Being using this product over a year now and no issues, did an oil analysis with Blackstone laboratory and they confirmed oil is good and can increase interval from 6,000 miles to

James WellsVerified

Oil filter

Oil filter seems to be good
But the fuel filter seems to make my truck a little sluggish

David ClarkVerified

MaxPower Motorsports Diesel Ford 6.7L Powerstroke Oil Filter 2011-2026

D.M. GAINESVerified

MaxPower Motorsports Diesel Ford 6.7L Powerstroke Oil Filter 2011-2026

Marvin A EnamoradoVerified

MaxPower Motorsports Diesel Ford 6.7L Powerstroke Oil Filter 2011-2026

Wade LottVerified

MaxPower Motorsports Diesel Ford 6.7L Powerstroke Oil Filter 2011-2026

AndrewVerified

Look and feel like oem

Good filter overall. Works as OEM with added bonus of home delivery.

Frequently Asked Questions

Still stuck? Message us with your year, make and model.

Use the fitment checker or the Vehicle Fitment tab. If you're unsure, contact us and we'll confirm before you order.

Orders ship in 1-2 business days. You'll receive tracking by email once dispatched.

30-day returns on unused items in original packaging.

Check your shipping email for tracking. If you can't find it, contact support with your order number.