OneFastShop BMW N54 Stage 3 LPFP upgrade kit, dual Walbro 450 in-tank fuel pump bucket assembly, front view
BMW N54 Stage 3 dual Walbro 450 LPFP fuel pump bucket with top hat, float, and in-tank filters, angled view
BMW N54 Stage 3 LPFP dual pump drop-in assembly for 135i 335i 535i Z4, side view
BMW N54 Stage 3 LPFP dual Walbro 450 fuel pump assembly, rear view showing pump wiring
Fuel tank flange O-ring included with the OneFastShop BMW N54 Stage 3 LPFP kit
BMW N54 Stage 3 LPFP secondary fuel pump activation harness with Hobbs switch and trigger wiring
OneFastShop BMW N54 Stage 3 LPFP upgrade kit, dual Walbro 450 in-tank fuel pump bucket assembly, front view
BMW N54 Stage 3 dual Walbro 450 LPFP fuel pump bucket with top hat, float, and in-tank filters, angled view
BMW N54 Stage 3 LPFP dual pump drop-in assembly for 135i 335i 535i Z4, side view
BMW N54 Stage 3 LPFP dual Walbro 450 fuel pump assembly, rear view showing pump wiring
Fuel tank flange O-ring included with the OneFastShop BMW N54 Stage 3 LPFP kit
BMW N54 Stage 3 LPFP secondary fuel pump activation harness with Hobbs switch and trigger wiring

BMW N54 Stage 3 LPFP Upgrade - Dual Walbro 450 Fuel Pump - 1000 WHP

OneFastShop SKU: N54STG3LPFP
Price
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In Stock – Ready to Ship
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Take your BMW N54 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 1,000 WHP on pump gas or 875 WHP on full E85. Direct replacement for BMW OEM part #16147163298.

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.

Specifications

Pumps 2x Walbro 450LPH (F90000274)
OEM Replacement BMW #16147163298
Max Power Support 1,000 WHP (pump gas) / 875 WHP (E85)
Secondary Pump Control Boost-referenced pressure switch (Hobbs switch)
Fuel Compatibility 91-93 octane, E85, ethanol blends, methanol injection
Controller Compatibility Reflex, Pro EFI
Installation Plug-and-play, no wiring modifications
Application Port injection and upgraded turbo setups
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
Part Number N54STG3LPFP

This part fits:

Year Make Model Chassis Engine
2008-2013 BMW 128i E82 / E88 N52
2008-2010 BMW 135i E82 / E88 N54
2011-2013 BMW 135i E82 / E88 N55
2013 BMW 135is E82 / E88 N55
2011 BMW 1 Series M Coupe E82 N54
2006-2010 BMW 323i E90 N52
2006 BMW 325i / 325xi E90 N52
2007-2013 BMW 328i / 328xi / 328i xDrive E90 / E91 / E92 / E93 N52
2006 BMW 330i / 330xi E90 N52
2007-2010 BMW 335i / 335xi / 335i xDrive E90 / E92 / E93 N54
2011-2013 BMW 335i / 335i xDrive E90 / E92 / E93 N55
2011-2013 BMW 335is E92 / E93 N54
2013-2015 BMW X1 sDrive28i E84 N20
2013-2015 BMW X1 xDrive28i E84 N20
2013-2015 BMW X1 xDrive35i E84 N55

EKP Compatibility Notice

Upgraded pumps draw more current than stock, so if you're on a weak or aged EKP2, it may overheat and shut down. We recommend upgrading to an EKP3.

Installation Notes

European spec vehicles: The original top hat may need to be transferred over during installation.

Required tool: A fuel pump lock ring removal tool is required for installation. Our Fuel Pump Lock Ring Removal Tool for BMW E-Chassis and MINI is available separately - add it to your order from our store.

Wiring and Installation Diagram

The secondary pump activation harness in this kit is configurable for negative trigger (included 13 psi pressure switch or a controller output) or positive trigger (switched 12V). The standard relay is on/off only and must not be driven PWM; use 0 or 100% duty cycle with electronic controllers.

Download the Dual Fuel Pump Activation Harness Installation Diagram (PDF), including step-by-step wiring for Motiv ReFlex+ controllers.

For a full walkthrough of relay, trigger, and controller setup, read our guide: How to Wire a Secondary Fuel Pump on a BMW.

Read before you buy. These guides cover fitment, what to expect, and how to install.

Shipping

  • Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Special order items follow a lead time we confirm with you individually before the order is committed.
  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
  • Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
  • 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 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty
  • 5 stars: 2 (100%)
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T
Trevor

If you're chasing four-figure numbers on an N54, this is the kit. Both pumps come on hard and the car finally has the headroom to make full power. Quality is exactly what you would expect at this price.

S
Sean Maddox

Stepping up from a single 450 to this dual setup was night and day. Logs at 30+ psi are flat and clean. The fact that everything fits in the OEM bucket location is a huge plus, and the wiring took maybe an hour following the included diagram.

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