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  • Complete kit with pump
  • Install kit only

E-Series 135i and 335i Stage 1 LPFP Upgrade


Product Description

These kits are designed to be installed inline with your stock low pressure fuel pump (LPFP).  They provide approximately 50% more flow when combined with your stock pump and can be purchased with or without the Walbro GSL392 pump.

  • Complete Kit:
    • Is the complete upgrade kit that also includes the Walbro GSL392 pump, comes fully assembled, and ready to install with your stock LPFP.
  • Install Kit:
    • This is a complete install kit for your Walbro GSL392 pump and does not include the pump. 
  • Both options include the following:
    • SAE J30R10 E85 compatible fuel line
    • 14ga fuel resistant wiring harness
    • Quick connect female bullet connectors (2)
    • Vent tube replacement clip
    • Nylon cable ties (10)
    • Stainless steel lock nuts (2)
    • 10ga/14ga stepdown butt splices w/E85 compatible heatshrink (2)
    • Pushlock pump retention fittings (2)
    • 14ga butt connectors w/heatshrink for pump removal to return to stock if/when desired (2)
  • Recommended accessories:
    • Lock Ring Removal Tool
  • Click on one of the links below to download your installation guide

Stage 1 Install Guides...

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*Note:  Walbro does not warranty this pump for E85 use.  If your application requires an E85 certified pump you may want to consider selecting a Stage 2 fuel kit.

** IMPORTANT:  Do NOT attempt to run this kit inline with our Stage 2 kit.  The Stage 2 kit is a higher flowing kit and this will not only restrict the flow of the stage 2 kit, it will result in failures.


Product Videos

LPFP Upgrade: Removing the fuel tank lock ring ()
  • LPFP Upgrade: Removing the fuel tank lock ring
  • LPFP Upgrade: PITA vent clip removal
  • LPFP Upgrade: Pump orientation