Process West Anti-Surge Fuel System – Subaru WRX/STI 2008–2014

The Process West Anti-Surge Fuel System is the ultimate bolt-on fuel delivery upgrade for the 2008–2014 Subaru WRX and STI. Designed to eliminate fuel starvation under hard driving, this external surge tank solution ensures reliable fuel flow for street, track, and high-power builds.

Unlike traditional in-tank upgrades, this system mounts externally just above the transmission cross member and features a billet 6061 aluminium anti-surge vessel. The design supports both single and twin pump configurations and is fully upgradable as fuel demands increase.

Each system includes a pre-assembled wiring harness for easy installation. The single pump version includes all necessary fuel lines, while the twin pump variant requires custom plumbing and an aftermarket fuel pressure regulator due to the increased flow.

Key Features:
– 2.4L billet aluminium external surge tank
– Supports single or twin Walbro 460 LPH pump setups
– Totally hidden when viewed from the engine bay
– Zero pump noise during operation
– Includes wiring harness with simple 2-wire connection
– Single pump supports up to 550kW at the wheels (petrol)
– Twin pump supports up to 750kW at the wheels (petrol)
– Walbro pumps include built-in check valves
– Easy upgrade path from single to twin pump configuration
– Twin pump systems fitted with -6AN pump outlets

Fitment:
Subaru WRX 2008–2014 (G3)
Subaru WRX STI 2008–2014 (G3)

Note:
The single pump system includes all fuel lines for plug-and-play installation. Twin pump systems require additional plumbing and an aftermarket fuel pressure regulator. Surge tank outlets terminate at the pump for custom integration.

Collection:
Browse more Process West products