Air and Fuel› Fuel Pumps, Regulators and Components

Walbro

GSS342 255 LPH In-Tank EFI Fuel Pump

$30.00

SKU: GSS342 and 400-766

In Stock
In Stock
Ships by Aug 4
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Walbro GSS342 is a classic "Walbro 255" EFI fuel pump, known for its reliability and performance for vehicles running gasoline-based fuels. This gerotor pump offers a flow rate of 255 LPH (advertised at 40 PSI, tested at 261 LPH @ 43.5 PSI by Radium) and draws minimal current, making it a solid choice for many applications. With a 39mm diameter and an 8.5mm outlet, the GSS342 is designed for in-tank use. It is rated to support up to 550 BHP on gasoline. However, it is important to note that Ti Automotive (Walbro's parent company) does not officially advertise compatibility with ethanol fuels, so users should research its suitability for alternative fuels like E85 before use. This specific listing includes the Walbro GSS342 fuel pump only. It does NOT include an installation kit, which typically contains items such as a filter sock, wiring pigtail, hose, and clamps. While an install kit is not included, this pump is compatible with part number 14-0143 Fuel Pump Filter Sock. For specific Nissan applications like the R32/R33/R34 Skyline and S13/S14/S15 240SX, a separate kit like the 400-766 install kit may be required for proper fitment.

MIA's Description

The Walbro GSS342 is a 255 LPH in-tank EFI fuel pump. It is a reliable gerotor pump that draws minimal current. This fuel pump is suitable for vehicles running only gasoline-based fuels and making less than 550 BHP.

Advertised with a flow rate of 255 LPH at 40 PSI, it was tested by Radium to flow 261 LPH at 43.5 PSI. The pump has an outlet diameter of 8.5mm (5/16") and a diameter of 39mm. The GSS342 includes the pump only and does not include an install kit.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandWalbro
Part NumberGSS342 and 400-766
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.

View Full Return Policy