BMW F-Series N55 N20 Stage 3 LPFP Upgrade - Dual Walbro 450 Fuel Pump - 850 WHP

Take your BMW F-Series N55 or N20 to the next level with the OneFastShop Stage 3 Dual Walbro 450 Low Pressure Fuel Pump (LPFP) assembly. Designed for high-boost, ethanol-based, and port-injected builds, this complete plug-and-play LPFP upgrade delivers the fuel volume required to support up to 850 WHP on pump gas or 800 WHP on full E85. Direct replacement for BMW OEM part #16117243975.

The dual pump system uses two Walbro F90000274 450LPH fuel pumps and includes a boost-referenced pressure switch (Hobbs switch) for automatic secondary pump activation. Arrives fully pre-assembled with all wiring, fittings, and hardware pre-configured - no splicing, cutting, or crimping required. Compatible with Reflex and Pro EFI controllers, and suitable for stock or heavily modified applications.

Key Features

• Supports up to 850 WHP on pump gas / 800 WHP on E85
• Dual Walbro 450LPH pumps (F90000274)
• Boost-referenced pressure switch (Hobbs switch) for automatic secondary pump activation
• 100% plug-and-play - no wiring modifications, splicing, or cutting required
• Complete OEM-replacement fuel bucket with top hat and float assembly
• E85-compatible for ethanol and flex-fuel builds
• Compatible with Reflex and Pro EFI controllers
• Suitable for port injection and upgraded turbo setups
• Direct replacement for BMW OEM #16117243975

Fitment

Specifications

What's in the Box

• 2x Walbro 450 fuel pumps (F90000274)
• Complete replacement fuel bucket with top hat and float
• Boost-referenced pressure switch (Hobbs switch)
• Positive and negative trigger wiring harnesses
• BMW secondary fuel pump activation harness
• In-tank filters, fittings, O-ring, and test plug