Walbro GSS341G3 255LPH High Pressure In-Tank Fuel Pump 180 Deg Inlet Universal

Vehicle Fitment

• Universal - compatible with any vehicle equipped with a 39mm straightwall in-tank fuel pump hanger assembly accepting a 180° inlet-to-outlet orientation
• Compatible with new or existing in-tank hanger assemblies without modification when body diameter and inlet orientation match
• Designed for gasoline (petrol) fueled engines - naturally aspirated, turbocharged, and supercharged EFI applications

Fitment Notes

• The GSS341G3 uses a 14mm inlet positioned at 180° relative to the outlet - meaning the inlet and outlet point in opposite directions. Verify this orientation matches your hanger assembly before ordering. The GSS340G3 (center inlet) and GSS342G3 (0°/inline) are alternative configurations for different hanger geometries.
• This pump is designed for GASOLINE only - NOT compatible with E85, methanol, or high-ethanol blends. Using incompatible fuel voids the warranty.
• OE replacement applications may require upgraded wiring at a minimum - verify wiring capacity before installation.
• A pre-filter / strainer should always be used with this pump - operating without adequate pre-filtration will shorten pump life and may cause premature failure.
• This listing is for the pump only - installation kit (strainer, wiring connector, and outlet fittings) must be sourced separately unless bundled.

Features

• Generation 3 (G3) upgraded one-piece outlet design for improved fitting robustness and connector durability over the prior GSS341 generation.
• Proven positive-displacement gerotor pump technology delivers consistent, high-pressure fuel flow across a wide operating range - ideal for supercharged and turbocharged EFI builds.
• 255 LPH flow rate at 40 PSI supports up to 550 horsepower in gasoline EFI applications, with significantly higher flow at elevated pressures versus standard-pressure pumps.
• 180° inlet-to-outlet orientation - inlet and outlet point in opposite directions - suited for hanger assemblies that require this specific port geometry.
• 39mm straightwall body fits directly into most compatible new or existing in-tank hanger assemblies without modification.
• Maximum system pressure rated at 112 PSI (772 kPa), providing reliable performance headroom across high-boost forced induction fuel systems.
• OE-quality construction manufactured to TI Automotive's production standards at their Caro, Michigan facility.
• Made in the USA at TI Automotive's Caro, Michigan manufacturing plant.

Specifications

• Part Number: GSS341G3
• Brand: Walbro / TI Automotive
• Generation: G3 (Third Generation GSS series)
• Pump Type: Universal in-tank, high-pressure
• Flow Rate: 255 LPH (67 GPH) at 40 PSI
• Horsepower Support: Up to 550 HP (gasoline EFI)
• Operating Pressure: 40 PSI (276 kPa)
• Maximum System Pressure: 112 PSI (772 kPa)
• Pump Technology: Positive-displacement gerotor
• Body Diameter: 39mm (straightwall)
• Overall Length: 120.0mm
• Inlet Diameter: 14mm
• Inlet Configuration: 180° from outlet (inlet and outlet in opposite directions)
• Outlet Diameter: 8mm (5/16")
• Filter Group: B
• Fuel Compatibility: Gasoline ONLY (not compatible with E85 or methanol)
• Country of Manufacture: United States (Caro, MI)

Included Components

• 1x Walbro / TI Automotive GSS341G3 255 LPH in-tank fuel pump (pump only)

Product Description

The Walbro GSS341G3 is the 180° inlet-to-outlet variant of TI Automotive's third-generation GSS series high-performance in-tank fuel pump, delivering 255 LPH at 40 PSI with support for up to 550 horsepower in gasoline EFI applications. It is the direct G3 successor to the original GSS341, sharing the same proven positive-displacement gerotor internals with an updated one-piece outlet design that improves fitting robustness and electrical connector durability. The defining characteristic of the GSS341G3 within the G3 family is its 14mm inlet positioned at 180° relative to the 8mm outlet - meaning fuel enters and exits the pump from opposite ends, a geometry required by specific in-tank hanger assemblies that the center-inlet GSS340G3 or inline GSS342G3 cannot accommodate.

The 39mm straightwall body fits directly into most compatible in-tank hanger assemblies without modification, and at 120mm overall length it matches the dimensional envelope of the prior GSS341 generation for drop-in compatibility. At 40 PSI operating pressure, the gerotor design delivers substantially more fuel than a standard-pressure pump at elevated system pressures - at 80 PSI, this pump flows over 210 liters per hour versus approximately 132 liters for a non-high-pressure unit. With a maximum system pressure rating of 112 PSI, it provides reliable headroom for high-boost forced induction and supercharged builds without approaching the pressure limits of the pump internals.

This pump is manufactured at TI Automotive's Caro, Michigan facility to OE quality standards and is designed for gasoline only - E85, methanol, and high-ethanol blends are not compatible and will void the warranty. A pre-filter or strainer must always be used with this pump; operating without adequate pre-filtration will accelerate wear and shorten service life. This listing includes the pump only - a compatible installation kit with strainer, wiring connector, and outlet fittings must be sourced separately for a complete installation.