AdvanEX 255LPH Electric Fuel Pump - High-Flow Replacement for Walbro GSS342, Includes Full Installation Kit

The AdvanEX 255LPH Electric Fuel Pump is a high-flow, direct-replacement unit designed to match Walbro GSS342 performance and comes with a full installation kit for quick, reliable upgrades.

This pump delivers a consistent 255 liters-per-hour flow rate and is built as a 100% new, tested replacement for vehicles that require higher fuel delivery. It ships with the essential hardware—hose, wire harness, foam and rubber sleeves, strainer and clamps—so you receive a ready-to-install package that supports both street and performance applications. AdvanEX backs the unit with one-year after-sale support and pre-shipment testing to ensure dependable operation out of the box.

How does this pump compare to the Walbro GSS342?

Functionally, the AdvanEX 255LPH unit is engineered to match the flow and fitment characteristics of the Walbro GSS342 while offering a new, tested alternative. The internal motor and impeller design deliver similar pressure and volume for EFI systems that need consistent fuel supply. It is intended as a drop-in replacement when the vehicle originally used a similar high-flow module.

• Rated flow: 255 liters per hour for steady fuel delivery
• Direct-replacement dimensions for common GSS342 applications
• 100% new parts, electronically tested before shipping
• Compatible with many cars and trucks requiring high-flow pumps

What comes in the installation kit and how does it help?

The package includes all the small parts you typically need to replace an in-tank or inline high-flow pump, so you won’t need to source additional fittings. Including the rubber and foam sleeves helps maintain quiet operation and proper mounting inside the fuel module. The wire harness and clamps simplify electrical and hose connections during installation.

• 1pc fuel pump and 1pc fuel strainer to protect the pump from debris
• 1pc rubber hose and 2pcs clamps for secure, leak-free fuel lines
• 1pc wire harness for reliable electrical connection
• 1pc rubber sleeve and 1pc foam sleeve for vibration damping and fitment

How difficult is installation and what should I prepare?

Installation complexity varies by vehicle: some applications allow straightforward drop-in replacement, while others require fuel-sending unit removal or tank access. Professional installation is recommended to ensure proper sealing, electrical connections, and fuel system calibration. If you choose DIY, prepare basic hand tools, a torque wrench, safety equipment, and follow fuel-system safety guidelines.

• Recommended: professional installation for safety and correct fitment
• If DIY: disconnect battery, relieve fuel pressure, and work in a ventilated area
• Use supplied harness and clamps for best sealing and electrical integrity
• Inspect fuel lines and connectors for wear while replacing the pump

What reliability and after-sale support does AdvanEX provide?

AdvanEX supplies this pump as a new, factory-tested part and offers a one-year after-sale service window for customer support. The pre-shipment testing helps reduce DOA occurrences and early failures. If you encounter issues, the company commits to responding and resolving problems, typically within 24 hours of contact.

• 100% new components and electronic testing before shipment
• One-year after-sale support for part-related questions or defects
• Customer support response commitment to resolve issues promptly
• Clear replacement contents reduce the need for extra parts purchase

Who is this for: The AdvanEX 255LPH Electric Fuel Pump is aimed at vehicle owners and mechanics who need a high-flow replacement for EFI systems—especially those replacing or upgrading Walbro-style GSS342 pumps. It suits daily drivers with higher fuel demands, performance street builds, and light-duty trucks requiring steady fuel pressure. Buyers who prefer a complete kit with mounting and electrical parts will value the included components and AdvanEX’s one-year support.