Fuel-It BMW E82 E90 E84 Dual Walbro Stage 4 Low Pressure Fuel Pump and Fuel Line Upgrade - N54 N55 - E85 Compatible - 1M, 135i, 335i
If your tuned BMW N54 or N55 is pushing past 600whp and the stock low pressure fuel pump cannot keep up, this Fuel-It Stage 4 Dual Walbro LPFP and fuel line upgrade is the proven, high-flow, E85-ready solution. Purpose-built for BMW 1M, 135i and 335i owners who demand reliable fuel pressure under boost, this boost-referenced, twin-pump setup delivers up to 300 percent more flow than stock while retaining the factory bucket, venturis and in-tank transfer systems for OE-level drivability and fuel starvation prevention.
This is the most powerful BMW LPFP upgrade available that still utilises the stock bucket and bypasses the factory restrictions to maintain higher pressures and greater flow. It is an ideal BMW N54 fuel pump upgrade and BMW N55 fuel pump upgrade for serious street, track and drag builds that need stable low pressure supply to the HPFP and port injection rail on petrol or ethanol blends. We have installed and used this kit on high-power N54 and N55 builds and our customers consistently report rock-solid fuel pressure and excellent reliability on E85 and high boost.
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Why choose this Fuel-It Stage 4 LPFP upgrade
- Up to 300 percent more flow than stock for big power N54 and N55 builds on petrol or E85
- Dual Walbro E85-compatible pumps in the stock bucket for OE fit, quiet operation and reliable fuel pickup
- Retains factory venturis and in-tank transfer systems while bypassing restrictive factory plumbing
- Boost-referenced configuration for consistent pressure under heavy load and high boost
- Comprehensive -6AN fuel line and 6 micron ethanol-compatible filter upgrade for clean, high-volume delivery to the HPFP and port injection rail
- Flow tested prior to shipping for peace of mind
What is included
- Complete plug-and-play replacement bucket assembly
- To utilise the secondary pump, an additional wiring harness is included and must be installed
- Two new E85-compatible Walbro 450 pumps - part number F90000274
- Optional upgrade to Walbro 525 pumps - part number F90000285
- Two new Walbro filters
- Custom fitting optimised for venturi function and pump output
- Spare vent tube clip
- Wiring harness for the secondary pump
- All required -6AN fuel lines to connect the pumps, the 6 micron E85-compatible fuel filter, HPFP feed and port injection rail
- 6 micron ethanol-compatible fuel filter assembly
- Flow testing prior to dispatch
Important requirement: This system requires port injection and an external fuel pressure regulator upgrade.
Additional requirements to run the secondary pump
- Return kit
- Port injection kit
Recommended accessories
- Lock ring removal tool
- Hobbs switch - for boost-referenced activation of the secondary pump
- Ethanol analyser and sensor - to monitor ethanol content
- Options: Bluetooth only, Bluetooth with JB4 integrated 0-5V, or Bluetooth with 50-150 Hz raw signal
Compatibility - BMW E chassis N54 and N55
All BMW E chassis models with N54 and N55 turbocharged engines including 1M, 135i and 335i.
- 1 Series E88 Convertible - 11/2006 to 10/2013
- 1 Series E82 Coupe - 11/2006 to 10/2013
- 3 Series E90 Saloon - 02/2004 to 09/2008
- 3 Series E90 LCI Saloon - 07/2007 to 12/2011
- 3 Series E91 Touring - 02/2004 to 08/2008
- 3 Series E91 LCI Touring - 07/2007 to 05/2012
- 3 Series E92 Coupe - 05/2005 to 02/2010
- 3 Series E92 LCI Coupe - 11/2008 to 06/2013
- 3 Series E93 Convertible - 09/2005 to 02/2010
- 3 Series E93 LCI Convertible - 11/2008 to 10/2013
- X1 E84 - 04/2009 to 06/2015
Compatibility check
We will verify fitment before dispatch. Provide your UK registration number or the last 7 digits of your VIN at checkout and we will run a compatibility check to ensure this BMW LPFP upgrade is correct for your vehicle.
Installation and fitting
Professional installation is recommended. For expert fitting and setup, including port injection and return system configuration, book with Nforcd in Warwickshire. Request a fitting quote via Sales@nforcd.com.
Part number
FI001
Manufacturer and warranty
Manufactured by Fuel-It
Fuel-It Limited Warranty
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