Spool FX-350 High-Pressure Fuel Pump – BMW B58 Gen 2

Spool FX-350 High-Pressure Fuel Pump for BMW B58 Gen 2 is a plug-and-play HPFP upgrade for G-series B58 applications.

• Designed for up to 350 bar / 35 MPa / 5000 psi operation
• Stainless-steel construction with DLC-coated piston and bore
• E85 compatible
• Installation lines, bracket, alignment tool and adapter harness included
• Compatible with Spool's Gen 2 high-lift cam-lobe upgrade

Selectable options: wireless ethanol analyzer and Spool 10-micron filter.

Fitment: G42/G43 M240i, G20/G21 M340i, G22/G23/G26 M440i, G30/G31 540i, G01 X3 M40i, G02 X4 M40i, G05 X5 40i, G06 X6 40i, G07 X7 40i, G29 Z4 M40i and other supplier-listed B58 Gen 2 applications.

Important: Proper low-pressure fueling and calibration changes are required.

Dispatch: Special order — allow 2–3 weeks.

Confirmed catalogue fitment

• Engine families: B58
• BMW chassis: G01, G02, G05, G06, G07, G11, G12, G15, G16, G20, G21, G22, G23, G26, G29, G30, G31, G32, G42, G43
• Vehicle models: M240i, M340i, M440i, 540i, 640i, 740i, 840i, X3 M40i, X4 M40i, X5 40i, X6 40i, X7 40i, Z4 M40i

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.