Spool FX-350 High-Pressure Fuel Pump – BMW B58 Gen 1

Spool FX-350 High-Pressure Fuel Pump for BMW B58 Gen 1 is an upgraded direct-injection fuel pump for higher ethanol content and larger-turbo applications.

• E85 compatible
• Plug-and-play installation architecture
• Calibration changes must be applied before the engine is started with the upgraded pump
• Low-pressure fuel delivery must be sufficient to prevent HPFP starvation and cavitation damage

Selectable options: wireless ethanol analyzer, 10-micron filter and stainless-steel high-pressure fuel-line add-on.

Applications: Spool lists BMW M140i, M240i, 340i, 440i and 540i Gen 1 B58 applications.

Dispatch: Special order — allow 2–3 weeks.

Confirmed catalogue fitment

• Engine families: B58
• BMW chassis: F20, F21, F22, F23, F30, F31, F32, F33, F36, G30
• Vehicle models: M140i, M240i, 340i, 440i, 540i

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.