Spool FX-350 High-Pressure Fuel Pump – BMW B46/B48 Gen 2

Spool FX-350 HPFP for BMW B46/B48 Gen 2 is a 350-bar high-pressure fuel-pump upgrade for higher-output direct-injection builds.

• 350 bar / 5000 psi operating capability
• Stainless-steel construction
• DLC-coated piston/bore architecture
• Plug-and-play hardware package

Configuration: select ethanol-analyzer requirement and whether to add the Spool 10-micron filter unit.

Calibration changes are required before operation.

Dispatch: Special order — allow 2–3 weeks.

Confirmed catalogue fitment

• Engine families: B46, B48

Fuel-system selection and installation

Fuel-system parts must be selected around the complete combination of engine generation, fuel type, target output, existing pump and injector configuration, and the calibration strategy. A component appearing for an engine family does not mean it replaces every factory or upgraded fuel-system arrangement used on that engine.

Professional installation and calibration are recommended where the product changes fuel pressure, pump control, injector flow, ethanol-content input or port-injection operation. Confirm wiring, plumbing, electrical load, controller requirements and compatible supporting hardware before ordering.

Before ordering

Select your exact BMW through MLAB My Garage and review the product options, included parts and installation requirements. Where a vehicle has been modified from its original engine, transmission or fuel-system specification, contact MLAB with the VIN and current hardware list so the combination can be checked before supply.

MLAB support

MLAB by Boost and Tune can assist with product selection, workshop installation and dyno calibration for supported BMW applications in Melbourne. Product availability and lead time should be confirmed when ordering supplier-built or special-order components.