Spool Stage 3 Low-Pressure Fuel Pump – BMW F90 M5 S63

Complete boost-activated twin-pump low-pressure fuel-system upgrade for BMW F90 M5 S63 applications.

• Secondary pump activates during boost onset
• Approximately doubles low-side flow capacity compared with the standard arrangement
• Designed to support more than 1200 wheel horsepower with suitable supporting hardware
• Compatible with high-demand ethanol-fuel applications
• Plug-and-play installation package

Kit contents / configuration:

• Dual-pump bucket assembly
• Secondary-pump activation harness
• Boost-activated switch
• Boost-reference adapter
• Hardware pack

Important: Fuel-system capacity depends on the complete DI/PI arrangement, fuel type, voltage, calibration and supporting hardware.

Confirmed catalogue fitment

• Engine families: S63B44T4
• BMW chassis: F90
• Vehicle models: M5
• Production years: 2018-2023
• Drivetrain: AWD

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.