Spool FX-350 Upgraded High Pressure Fuel Pump [B46/B48]
Spool FX-350 Upgraded High Pressure Fuel Pump [B46/B48] is a high-pressure fuel-pump upgrade that increases high-pressure direct-injection fuel capacity for tuned engines and ethanol-blend applications. It is intended for performance-focused builds where the fuel system, airflow or drivetrain must support demands beyond the factory configuration.
The product is supplied as an application-specific Spool configuration. Check the engine version, body style and selected package contents before ordering. Correct sizing and professional installation are particularly important for fuel-system and engine-management changes.
Technical details
- System pressure up to 350 bar according to the manufacturer
- Plug-and-play construction with application-specific connections
- Requires ECU calibration before start-up
- Manufacturer lifetime warranty subject to product-specific warranty terms
- Manufacturer SKU or variant code depends on the selected configuration
Available options
- No ethanol sensor, Vehicle has Spool ethanol sensor, Add Spool ethanol sensor
- No 10 µm filter, Add 10 µm filter
An upgraded high-pressure pump requires the product-specific ECU calibration changes before the engine is started. Make sure the low-pressure fuel system can also support the selected power level.








