Spool FX-400X HPFP Upgrade | Toyota Supra B58 Gen2
The Spool Performance FX-400X is a flagship High-Pressure Fuel Pump (HPFP) for the Toyota Supra B58 Gen2 engine. This model offers an operating pressure of up to 350 bar and approximately +20% more capacity compared to the FX-350, enabling extreme power purely with direct injection.
What is the FX-400X?
The FX-400X is designed for maximum performance and fuel capacity on the B58 Gen2 platform.
- Operating pressure up to 350 bar / 35 MPa / 5000 psi
- Approx. +20% more flow vs. FX-350
- Full E85 compatibility
- Plug & Play installation
- Optimized for DI-only high-power setups
Combined with Spool IFX350 Gen2 injectors:
- Enables very high power levels without a port injection system
- Eliminates key limitations of the Gen2 B58 fuel system
Performance
HPFP + IFX350X Gen2 injectors:
- Gasoline: approx. 1100 whp
- E50: approx. 900 whp
- E85: approx. 800 whp
HPFP + IFX150 Gen2 injectors + cam lift mod:
- Gasoline: approx. 1200 whp
- E50: approx. 1050 whp
- E85: approx. 900 whp
Intended Use
The FX-400X is designed for extreme DI-only tuning setups:
- Maximum performance without supplemental injection
- Compatible with Spool Gen2 injectors and cam lift upgrade
- Enables very high power figures
Installation
- Fully Plug & Play
- Includes all necessary components for easy and clean installation
Package Contents
- Spool FX-400X 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 use
- 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 the warranty
- An upgraded LPFP is practically essential for setups of this power level
Warranty
- Lifetime warranty against manufacturing and material defects