Walbro 255 LPH GSL392 Inline External Fuel Pump (Gas)




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The Walbro GSL392 255LPH High Pressure Inline Fuel Pump is an extremely popular upgrade to vehicles with engine and performance modifications, supporting up to 650 horsepower. Designed to be mounted externally outside the tank and can be coupled with another pump for extra fuel.

The GSL392 is one of the most popular fuel pumps made by Walbro. Typically used in vehicles for racing or performance purposes where higher pressure fuel is necessary.

Vehicle Fitment:
Universal Fuel Pump
For External Use (Out of Tank)

Fuel Compatibility:
Not for use with E85

Purchase Options:
• Fuel Pump Only (GSL392)
• Fuel Pump & Install Kit (GSL392 & 400-939)
• Fuel Pump, Install Kit and -6AN to 10mm x 1.0 Fittings (670470)

Install Notes:
This pump should never be operated without a fuel filter between the tank and the pump. This pre-filter should be 20 to 40 microns. Additionally, almost all applications require a 10-micron post-filter between the fuel pump and the fuel rail. Putting just a 10-micron filter before the pump is not recommended. Click here to see our Fuel Filters

Compatible Install Kit (400-939):
Includes two standard universal fittings which can connect to any 5/16 inch hose.

AN Lines:
The Install kit includes fittings to connect to 5/16" hose,  if you are running AN lines, you'll need two -6AN 10mm x 1.0 fittings (670470) available in the purchase menu.

• Gasoline only (Not for use with E85)
• 255 (LPH) Liters Per Hour
• OE-proven second generation
• Fits most EFI applications including turbo and supercharged
• Variety of pressures and flows available, including high pressure performance
• All metal shell including inlet and outlet
• 10mm x 1mm threaded inlet and outlet accept a variety of fittings
• Lightweight, compact design
• QS9000 certified

Walbro GSL392 Flow Chart

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