Walbro GSS352G3 Gen 3 350LPH High Pressure In-Tank Fuel Pump 600HP Universal

Vehicle Fitment

• Universal - fits any vehicle equipped with a 39mm straightwall in-tank fuel pump hanger assembly
• Compatible with new or existing in-tank hanger assemblies without modification when dimensions match
• Designed for gasoline (petrol) fueled engines - naturally aspirated, turbocharged, and supercharged applications

Fitment Notes

• GSS352G3 features an 11mm inlet positioned INLINE with the outlet - verify inlet orientation compatibility with your hanger assembly before ordering. The GSS350G3 (22mm center inlet) and GSS351G3 (11mm inlet, 180° from outlet) are alternative configurations for different applications.
• This pump is designed for GASOLINE only - it is NOT compatible with E85, methanol, or ethanol blends above standard pump gas. Fuel type incompatibility voids warranty.
• OE replacement applications may require upgraded wiring harness at a minimum - verify wiring capacity before installation.
• Recommended operating voltage is standard vehicle voltage (13.5V). If using an ECU-controlled alternator or voltage booster, limit pump voltage to 16V maximum to prevent gerotor cavitation.
• A fuse rated at 25A is recommended to protect the pump and wiring circuit.
• This listing is for the pump only - installation kit (strainer, wiring, and fittings) must be purchased separately or as a bundle.

Features

• Generation 3 (G3) upgraded outlet design with improved one-piece construction for enhanced fitting robustness and connector durability over the prior GSS34X generation.
• Proven positive-displacement gerotor pump technology delivers consistent, high-pressure fuel flow across a wide operating range without cavitation at standard vehicle voltages.
• 350 LPH flow rate at 40 PSI and 13.5V - a substantial increase over the 255 LPH output of the predecessor GSS342 generation.
• Supports 600+ horsepower at 40 PSI (13.5V) in gasoline-fueled applications, making it suitable for high-boost forced induction builds.
• 39mm straightwall body diameter mounts directly into new or existing in-tank hanger assemblies across a wide range of applications without modification.
• OE-quality construction manufactured to TI Automotive's stringent production standards at their Caro, Michigan facility.
• Operates effectively across a pressure range of 25-70 PSI, making it suitable for both returnless and return-style fuel systems.
• Made in the USA at TI Automotive's Caro, Michigan manufacturing plant.

Specifications

• Part Number: GSS352G3
• Brand: Walbro / TI Automotive
• Generation: G3 (Third Generation GSS series)
• Pump Type: Universal in-tank, high-pressure
• Flow Rate: 350 LPH (90 GPH) at 40 PSI / 13.5V
• Horsepower Support: 600+ HP at 40 PSI / 13.5V (gasoline)
• Operating Pressure Range: 25-70 PSI
• Pump Technology: Positive-displacement gerotor
• Body Diameter: 39mm (straightwall)
• Outlet Diameter: 8mm (5/16")
• Inlet Diameter: 11mm - positioned inline with the outlet
• Overall Length (inlet to outlet tip): 123.7mm
• Recommended Operating Voltage: 13.5V (standard vehicle voltage)
• Maximum Recommended Voltage: 16V
• Recommended Fuse: 25A
• Fuel Compatibility: Gasoline ONLY (not compatible with E85 or methanol)
• Country of Manufacture: United States (Caro, MI)

Included Components

• 1x Walbro / TI Automotive GSS352G3 350 LPH in-tank fuel pump (pump only)

Product Description

The Walbro GSS352G3 is the third-generation evolution of TI Automotive's industry-standard GSS series in-tank fuel pump, delivering 350 LPH of high-pressure fuel flow at 40 PSI and 13.5V - enough to support over 600 horsepower in gasoline-fueled applications. It directly supersedes the widely used GSS342 (255 LPH) from the previous G2 generation, sharing the same proven positive-displacement gerotor pump internals while introducing an upgraded one-piece outlet design that improves fitting robustness and electrical connector durability. The gerotor design is the same technology used in OE fuel systems for the Chevrolet Corvette and Dodge Viper, and it has been the benchmark of in-tank performance fuel pumps for over two decades.

The GSS352G3 specifically features an 11mm inlet positioned inline with the outlet - one of three inlet configurations available in the GSS350 G3 family, each designed to accommodate different hanger assembly geometries. The 39mm straightwall body fits directly into new or existing in-tank hanger assemblies across a broad range of platforms without modification, making it a versatile upgrade for turbocharged, supercharged, and naturally aspirated builds that have outgrown the flow capacity of a stock or 255 LPH replacement pump. It operates effectively across a pressure range of 25-70 PSI, covering both return and returnless fuel system configurations.

This pump is designed and manufactured in the USA at TI Automotive's Caro, Michigan plant, and is rated to OE quality standards. It is suitable for gasoline only - it is not compatible with E85, methanol, or high-ethanol blends, and fuel type incompatibility will void the warranty. Operating voltage should remain at standard vehicle levels; if using a voltage booster or ECU-controlled alternator, limit supply to 16V maximum to prevent gerotor cavitation. A 25A fuse is recommended. This listing includes the pump only - a compatible installation kit (strainer, wiring connector, and outlet fittings) must be sourced separately for a complete installation.