Take your BMW N54 to the next level with the OneFastShop Stage 3.5 Dual Walbro 450 + 535 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 1,100 WHP on pump gas or 950 WHP on full E85. Direct replacement for BMW OEM part #16147163298.
The dual pump system pairs a Walbro F90000295 535LPH primary pump with a Walbro F90000274 450LPH secondary pump 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.
| Part Number | N54STG35LPFP |
| Pumps | 1x Walbro 450LPH (F90000274) + 1x Walbro 535LPH (F90000295) |
| OEM Replacement | BMW #16147163298 |
| Max Power Support | 1,100 WHP (pump gas) / 950 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 |
| 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 |
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.
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, MINI, and Porsche is available separately - add it to your order from our store.
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+ and bootmod3 Rev2 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.
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