Spool FX-400 HPFP Upgrade | BMW B58 Gen.1
The Spool Performance FX-400 is the manufacturer's flagship High-Pressure Fuel Pump (HPFP) for BMW B58 Gen1 engines. This pump is designed for extreme performance projects that require maximum fuel capacity with direct injection only.
Please note
This product is currently on backorder. Please check availability before placing an order.
What is the FX-400?
The FX-400 is Spool's top-tier HPFP, offering approximately +20% more flow compared to the previous FX-200 model across its entire operating range.
- Approx. +20% more flow vs. FX-200
- 200 bar operating pressure
- Full E85 compatibility
- Plug & Play installation without modifications
- Designed for extreme power levels
Additional capacity allows for:
- Higher ethanol blends
- Larger turbochargers
- Significantly higher power outputs
Performance and intended use
The FX-400 has been specifically developed for high-power DI-only configurations:
- Optimized to work in conjunction with IFX150 Gen1 injectors
- Enables very high power without a port injection system
- Significantly improves the capacity of the B58 Gen1 fuel system
Why is an upgrade necessary?
The stock B58 Gen1 HPFP, as well as lighter upgrades, quickly become a limitation:
- Insufficient fuel delivery for high power levels
- Ethanol blends remain limited
The FX-400:
- Elevates the fuel system capacity to a new level
- Enables demanding turbo and tuning configurations
- Supports maximum performance
Software Requirements
- Requires software modifications before use
- Calibration is essential to ensure safe operation
Spool:
- Provides necessary calibration data to the tuner
- Assists in finding an experienced tuner if needed
Note: Spool does not offer ready-made custom tunes
Important Note: LPFP
The low-pressure fuel system is critical:
- Insufficient supply can damage the pump and injectors
- HPFP lubrication relies on fuel flow
- Lack of fuel can lead to wear and failure
Recommendation: ensure adequate low-pressure side upgrade