Walbro GSS250G3 High-Pressure Fuel Pump for ~350HP Performance EFI Systems

Product Overview

• Walbro GSS250G3 high-pressure universal in-tank fuel pump

Features

• High-pressure fuel delivery ideal for performance EFI applications
• Rated to support fueling requirements up to ~350 horsepower
• Gerotor-style internal design for smooth, efficient flow
• Compact in-tank body fits many stock fuel pump locations
• Offset inlet/outlet for flexible hose routing
• Robust construction for reliable street and performance use
• Provides improved fuel delivery over many factory pumps
• Designed for gasoline-powered engines in custom or upgraded systems

Specifications

• Part Number: GSS250G3
• Pump Type: Universal in-tank electric fuel pump
• Flow Rate: ~250 liters/hour (~66 GPH)
• Estimated Support: ~350 HP (dependent on system pressure and setup)
• Fuel Type: Gasoline
• Voltage: 12 V automotive
• Body Diameter: Compact design (~39 mm)
• Inlet/Outlet: Barbed connections (custom hose required)
• Installation: Universal - custom hanger/wiring recommended

Included Components

• 1x Walbro GSS250G3 high-pressure fuel pump

Product Description

The Walbro GSS250G3 High-Pressure Fuel Pump is a universal in-tank electric pump engineered for performance applications requiring stronger fuel delivery. Delivering approximately **250 liters per hour (~66 GPH)**, this gerotor-style pump is suited to support engines producing around **350 horsepower** when used within a properly configured EFI system. Its compact body and offset inlet/outlet design allow flexible installation in many fuel tanks where higher pressure and consistent flow are needed.

Designed for gasoline engines, the GSS250G3 provides a significant upgrade over many factory fuel pumps, reducing the risk of fuel starvation under load and improving throttle response in high-demand situations. Because this is a **universal pump**, installation typically requires a compatible hanger or custom mounting, appropriate wiring, and fuel lines suited to your vehicle's system. For best results, use in conjunction with quality pre-tank filtration, a fuel pressure regulator, and proper tuning to match your performance setup. This pump is ideal for street performance builds and moderate horsepower increases where reliable high-pressure fuel delivery is essential.