BMW F-Series N55 N20 Stage 2 LPFP Upgrade - Walbro 450 Fuel Pump - 575 WHP

Upgrade your BMW F-Series N55 or N20 fuel system with the OneFastShop Stage 2 Low Pressure Fuel Pump (LPFP) assembly. This drop-in replacement swaps the restrictive OEM fuel bucket for a complete E85-compatible unit built around the proven Walbro 450 (F90000274) pump - delivering the fuel volume needed to support up to 575 WHP on pump gas or 500 WHP on full E85. Direct replacement for BMW OEM part #16117243975, with plug-and-play installation and zero wiring modifications required.

Specifications

Fitment

What's in the Box

• Complete fuel bucket assembly with Walbro 450 pump pre-installed
• Top hat and float assembly
• Walbro fuel filter
• Fittings and O-ring

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy