Walbro GSS343G3 255LPH High Pressure 50PSI In-Tank Fuel Pump Universal 550HP

Vehicle Fitment

• Universal - compatible with a wide range of EFI-equipped vehicles using a 39mm straightwall in-tank fuel pump hanger assembly
• Compatible with new or existing in-tank hanger assemblies when body diameter and inlet configuration match
• Designed for gasoline (petrol) fueled, naturally aspirated, turbocharged, and supercharged EFI applications

Fitment Notes

• The GSS343G3 (formerly F20000169) operates at a rated pressure of 50 PSI - higher than the standard GSS340G3/341G3/342G3 family which operates at 40 PSI. Verify your fuel system's pressure requirements before selecting this pump.
• This pump is designed for GASOLINE only - NOT compatible with E85, methanol, or high-ethanol blends. Using incompatible fuel voids the warranty.
• Verify inlet configuration compatibility with your specific hanger assembly before ordering.
• OE replacement applications may require upgraded wiring at a minimum - verify wiring capacity before installation.
• 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 engineered for improved fitting robustness and connector durability over earlier GSS generation variants.
• Proven positive-displacement gerotor pump technology delivers consistent, high-pressure fuel flow well suited for supercharged and turbocharged EFI applications.
• Rated operating pressure of 50 PSI - higher than the standard GSS34XG3 series, making it appropriate for fuel systems requiring elevated base pressure.
• 255 LPH flow rate supports up to 550 horsepower in gasoline EFI applications across a range of naturally aspirated and forced induction setups.
• 39mm straightwall body is compact enough to fit existing in-tank hanger assemblies without modification in most compatible applications.
• Formerly sold as part number F20000169 - a direct successor and updated outlet variant of the same proven pump platform.
• OE-quality construction built 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: GSS343G3
• Formerly Known As: F20000169
• Brand: Walbro / TI Automotive
• Generation: G3 (Third Generation outlet design)
• Pump Type: Universal in-tank, high-pressure
• Flow Rate: 255 LPH
• Horsepower Support: Up to 550 HP (gasoline EFI)
• Rated Operating Pressure: 50 PSI
• Pump Technology: Positive-displacement gerotor
• Body Diameter: 39mm (straightwall)
• Fuel Compatibility: Gasoline ONLY (not compatible with E85 or methanol)
• Country of Manufacture: United States (Caro, MI)

Included Components

• 1x Walbro / TI Automotive GSS343G3 255 LPH in-tank fuel pump (pump only)

Product Description

The Walbro GSS343G3 is a 39mm in-tank high-pressure fuel pump rated at 255 LPH and 50 PSI, capable of supporting up to 550 horsepower in gasoline EFI applications. Formerly sold as the F20000169, it carries the same proven positive-displacement gerotor pump internals that have made the Walbro GSS line the benchmark for in-tank performance fuel pumps for over two decades, combined with the Generation 3 updated one-piece outlet design for improved fitting robustness and connector durability. Its 50 PSI rated pressure distinguishes it from the standard GSS340G3, GSS341G3, and GSS342G3 variants, which are rated at 40 PSI - making the GSS343G3 the appropriate choice for fuel system configurations that require a higher base pressure.

The 39mm straightwall body is compact enough to fit into most compatible existing in-tank hanger assemblies without modification, making it a practical upgrade for a wide range of EFI-equipped gasoline platforms. The gerotor design delivers consistent fuel pressure without the pulsation characteristics of turbine-style pumps, ensuring stable fuel delivery across the full operating load range of naturally aspirated and forced induction builds alike. As with all pumps in the GSS line, it is manufactured at TI Automotive's Caro, Michigan facility and built to OE quality standards.

This pump is designed for gasoline only - E85, methanol, and high-ethanol blends are not compatible and will void the warranty. Before ordering, verify that your hanger assembly inlet configuration is compatible with this pump. This listing includes the pump only - a compatible installation kit including strainer, wiring connector, and outlet fittings must be sourced separately for a complete installation. For builds requiring higher flow, TI Automotive's GSS350G3/351G3/352G3 350 LPH variants are available as direct upgrades within the same 39mm GSS pump family.