Spool FX-350 HPFP Upgrade | BMW B58 Gen.2
The Spool Performance FX-350 is a top-tier high-pressure fuel pump (HPFP) for BMW B58 Gen2 engines. This solution is designed for maximum performance with direct injection, offering up to 350 bar operating pressure and significantly expanded fuel capacity without a port injection system.
What is the FX-350?
The FX-350 is an advanced HPFP, manufactured from stainless steel and equipped with a DLC-coated piston and cylinder for high wear resistance and precision.
- Operating pressure up to 350 bar / 35 MPa / 5000 psi
- Same flow rate as FX-200, but with significantly higher pressure
- Optimized for high RPMs and loads
- Plug & Play installation
Compatibility with Spool Gen2 high lift cam lobe upgrade:
- Increases overall fuel output
- Specially designed springs prevent valve float at high RPMs
Performance
HPFP only:
- Gasoline: approx. 800 whp
- E50: approx. 670 whp
- E85: approx. 600 whp
HPFP + IFX150 Gen2 injectors:
- Gasoline: approx. 900 whp
- E50: approx. 740 whp
- E85: approx. 660 whp
HPFP + IFX150 Gen2 injectors + cam lift mod:
- Gasoline: approx. 1050 whp
- E50: approx. 950 whp
- E85: approx. 800 whp
Intended Use
The FX-350 is specifically designed for DI-only high-power configurations:
- Enables very high power without additional injection
- Optimized to work with IFX150 Gen2 injectors
- Removes a significant limitation of the B58 Gen2 fuel system
Installation
- Fully Plug & Play
- Includes all necessary components for a clean and easy installation
Package Contents
- Spool FX-350 High-Pressure Fuel Pump
- Mounting bracket
- Pump alignment tool
- Triple-layer low-pressure hose (nylon / steel braid / PTFE)
- Plug & Play HPFP adapter harness
Software Requirements
- Requires software modifications before commissioning
- Support for various flash platforms is under development
- Spool can assist with implementing the necessary calibration changes
Important Note: LPFP
The low-pressure fuel system is critical:
- Insufficient supply can cause cavitation and damage
- Such damage is not covered by warranty
- An upgraded LPFP is practically essential
Warranty
- Lifetime warranty against manufacturing and material defects
Compatibility
Suitable for, among others, the following B58 Gen2 models:
- G42 / G43 M240i, M240xi
- G20 / G21 M340i, M340xi
- G22 / G23 / G26 M440i, M440xi
- G30 / G31 540i, 540xi
- G05 X5 40i
- G06 X6 40i
- G07 X7 40i
- G01 X3 M40i
- G02 X4 M40i
- G29 Z4 M40i
- G32 640i, 640xi
- G11 / G12 740i, 740xi
- G15 / G16 840i, 840xi