Process West Anti-Surge Fuel System
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Process West Anti-Surge Fuel System - Subaru WRX / STI (GE/GH/GR/GV)
The Process West Anti-Surge Fuel System keeps the fuel pump fed when the tank is low or the car is cornering hard, so the engine never sees a lean spike from fuel surge. It is built around a 2.4 litre surge vessel with Walbro pumps that have a built-in check valve. The system runs without audible pump noise and sits completely out of sight from the engine bay.
Choose a single Walbro pump or a double Walbro setup. The single system can be upgraded to twin pumps later as fuel demand grows.
Note: Installation by a professional is recommended.
Features
- 2.4 litre surge vessel capacity
- Walbro pumps with a built-in check valve
- No audible pump noise
- Upgradable from a single to a twin pump system
- Wiring harness included
- Hidden from view when looking into the engine bay
Pairs Well With
- Process West Dual Injector TGV Deletes - Subaru WRX (GD/GE/GH/GR/GV) / STI (GD/GRB/GVB/VA) (EJ20/EJ25)
- Process West Front Mount Intercooler Kit - Subaru WRX (GE/GH/GR/GV)
- Process West Front Mount Intercooler Kit - Subaru STI (GRB/GVB)
- COBB Tuning Fuel Rails/Line Kit Package - Subaru STI (GRB/GVB/VAB)
- COBB Tuning Fuel Pressure Regulator for Fuel Rail Kit - Subaru STI (GRB/GVB/VAB)
Need help confirming fitment? Contact our team at sales@chicaneaustralia.com.au.
Product
- Brand
- Process West
- Part number(s)
- PWFS03 (single), PWFS04 (double)
Details
- Product
- Anti-surge fuel system
- Surge vessel capacity
- 2.4 litres
- Pumps
- Walbro 460, single or double (built-in check valve)
- Wiring harness
- Included
Contents
- Anti-surge fuel system with Walbro pump(s)
- Wiring harness
No instructions available for this product.
Vehicle fitment
Universal fit: this part suits any car. Check the specifications above for sizes and fittings.
| Make | Model | Chassis | Years | Versions | Engine | Brakes | Position |
|---|
Can’t see your car? Ask us and we’ll check fitment for you.

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