GFB Mach 2 Recirculating Blow Off Valve
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GFB Mach 2 Recirculating Blow Off Valve - Subaru WRX/STI (GC8) MY99-00 / Forester GT (SF) / Forester XT (SG) MY03-05 / Liberty B4 (BE/BH)
GFB's Mach 2 is a direct bolt-on replacement for your Subaru's factory bypass valve, using GFB's proven TMS technology to help the turbo return to peak boost up to 30% faster on gear changes. It's a 100% recirculating design, so you get the performance gain without any extra venting noise, though atmospheric conversion kits are available separately if you want more sound.
This listing covers the Subaru WRX and STI (GC8) MY99-00, Forester GT (SF) 1997-2002, Forester XT (SG) MY03-05, and Liberty B4 (BE/BH) 1998-2003.
Important: Forester XT (SG) owners must confirm their factory BOV flange type before ordering. This valve suits Diamond flange only — Triangle flange applications require part T9503.
Key Features
- TMS technology for faster boost recovery between gear shifts
- 100% recirculating (plumb back) configuration — no added blow off noise
- Direct bolt-on fitment — no adaptors or vehicle modification required
- Holds boost well beyond factory turbo output capability
- Optional atmosphere venting conversion kits and trumpets (6110/5702) available separately
Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm your vehicle's year, model and BOV flange type before ordering.
Not sure if this suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.
Vehicle Compatibility
| Make | Model | Chassis | Engine |
|---|---|---|---|
| Subaru | Forester GT | SF | - |
| Subaru | Forester XT | SG | EJ205 |
| Subaru | Liberty B4 | BE/BH | EJ208 |
| Subaru | STI | GC8 | EJ207 |
| Subaru | WRX | GC8 | EJ205 |
Technical Specifications
| Spec | Value |
|---|---|
| Valve Configuration | 100% Recirculating (Plumb Back) |
| Technology | TMS (Turbo Management System) |
| Flange Type | Diamond flange (Triangle flange fitment requires T9503) |
| Boost Holding | Effectively unlimited, per GFB |
| Atmosphere Conversion | Optional hose plug or separate Atmosphere Conversion Kit |
| Optional Outlet Trumpets | Standard trumpet (6110) or whistling trumpet (5702), sold separately |
No instructions available for this product.
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