Spool Stage 3 Bucketless Low-Pressure Fuel Pump – BMW N54/N55 E9X/E8X

Spool Stage 3 Bucketless LPFP is the higher-capacity modular low-pressure fuel-pump solution for BMW E9X/E8X N54/N55 applications.

• Designed for high-output gasoline and E85 combinations
• Bucketless modular architecture
• Drop-in performance fuel-pump solution

Spool's current product page describes compatible upgraded 6AN PTFE fuel-line configurations, but the current purchasable product is supplied as a single pump variant. Fuel-line upgrades can be paired separately where required.

Fitment: BMW E8X/E9X N54/N55 applications including compatible 135i, 335i and 335is.

Dispatch: Special order — allow 2–3 weeks.

Confirmed catalogue fitment

• Engine families: N54, N55
• BMW chassis: E82, E88, E90, E91, E92, E93
• Vehicle models: 135i, 335i, 335is

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.