Stage 20 - Walbro Pump - Feed more fuel.

Now the only way to get more fuel to those injectors and fuel rails faster is with upgrading your fuel pump. There are many available, but only one is a direct plug in for your WRX. The Walbro GSS342 flows 255 liters per hour and requires NO cutting, wiring, or modification.

As you can see, the install is very easy. The rear seat is removed along with the trunk lining. The pump pulls out and is switched with no hassles. This large pump will help in fuel delivery for the larger turbo and is essential for the fuel system.