Air and Fuel Fuel Pumps, Regulators and Components

Walboro

GSS342G3 255 LPH In-Tank Electric Fuel Pump

$116.85

SKU: GSS342G3/400-791

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In Stock
Ships by Aug 4
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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Walbro GSS342G3 high output in-tank electric fuel pump is engineered to deliver a robust flow rate of 255 liters of fuel per hour. For instance, at 80 PSI, the equivalent HP (high pressure) fuel pump can flow over 210 liters (50 gallons) per hour, a substantial increase from the standard 255lph pump's 132 liters (35 gallons) per hour at the same pressure. Constructed with Walbro's proven gerotor design, the GSS342G3 maintains compact external dimensions. This allows it to fit within existing hanger assemblies without requiring modifications, simplifying installation. The pump is designed for gasoline fuel and is rated to support 500+ horsepower applications. Applications include the 2002-2007 Subaru WRX / STi. The GSS342G3 model features a straight-through inlet/outlet setup. It's important to note that while the pump itself is generally well-regarded, one user reported that the supplied installation kit for 02-07 WRX models required significant modification, including shaving the rubber bushing and creative hose attachment, to fit properly. The kit includes a wiring kit, clamps, and an in-tank filter sock.

MIA's Description

The Walbro GSS342G3 is a high-output in-tank electric fuel pump with a flow rating of 255 liters per hour. It delivers significantly more fuel at higher pressures compared to standard pumps, with the HP version flowing over 210 liters per hour at 80PSI. This fuel pump utilizes a proven gerotor design and features compact outside dimensions that fit existing hanger assemblies without modification.

Fitment

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Specifications

BrandWalboro
Part NumberGSS342G3/400-791
CategoryAir and Fuel

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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