Process West Billet Intake Manifold
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Process West Billet Intake Manifold - Subaru WRX / STI / Forester XT / Liberty GT (EJ20/EJ25)
The Process West Billet Intake Manifold replaces the factory manifold on EJ20 and EJ25 Subarus with a CNC-machined billet aluminium design. Generous bell-mouth runner entries and thick-wall polished mandrel-bent tubes, joined with high-end TIG welding, give a manifold rated to 100 psi of boost. The street plenum volume and runner length favour strong low and mid-range torque, and still suit the factory air conditioning. Process West's testing on a stock engine, turbo and fuel system showed gains of about 9% in both power and torque.
Choose a raw or black finish, a stock or reverse throttle orientation, and a cable, drive-by-wire or Bosch 74mm drive-by-wire throttle flange. Match the orientation and throttle type to your engine and intake layout.
Note: Please confirm the throttle orientation and throttle type for your car with our team before ordering. Shorter billet TGVs are available for more top-end power. Installation by a professional is recommended.
Features
- CNC-machined billet aluminium components
- Generous bell-mouth runner entries
- Thick-wall polished mandrel-bent tubes with TIG welded joins
- Rated to 100 psi of boost
- Street plenum volume works with the factory air conditioning
- About 9% more power and torque in Process West's stock-engine testing
Need help confirming fitment? Contact our team at sales@chicaneaustralia.com.au.
Product
- Brand
- Process West
- Finish
- Raw, Black
- Part number(s)
- PWIM001, PWIM002, PWIM003, PWIM004, PWIM008, PWIM009, PWIM001B, PWIM002B, PWIM003B, PWIM004B, PWIM008B, PWIM009B
Details
- Product
- Billet intake manifold (street)
- Engine
- Subaru EJ20 / EJ25
- Construction
- CNC billet aluminium, mandrel-bent tube, TIG welded
- Boost rating
- 100 psi
- Air conditioning
- Compatible with the factory system
- Throttle orientation
- Stock or reverse
- Throttle type
- Cable, drive-by-wire or Bosch 74mm DBW
Contents
- Process West Billet Intake Manifold Assembly
- Mounting Hardware
- Throttle Flange (as per configuration)
No instructions available for this product.

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