GFB Mach 2 Recirculating Blow Off Valve
Not sure which option fits your application? Contact Us — we're happy to help.
Request a Price Match
Found it cheaper elsewhere? Send us the details and we'll do our best to match it.
Request received
Thanks! Our team will review it and be in touch shortly.
GFB Mach 2 Recirculating Blow Off Valve - Subaru WRX/STI (GC8) MY94-96 / Toyota Supra (JZA80) - 20mm
GFB's Mach 2 uses proven TMS technology to restore boost up to 30% faster than a factory diverter valve, giving you sharper throttle response without the compromises of the stock bypass valve. It's a straightforward, no-fuss upgrade for anyone wanting better response without adding noise. SKU T9120.
This listing covers the 20mm Mach 2 recirculating valve for the Subaru WRX and STI (GC8) MY94-96, and the Toyota Supra (JZA80). The valve ships as a 100% plumb back unit for factory-style performance, with atmosphere venting conversion kits available separately if you want some noise with your boost.
Note: Fitment on the WRX and STI may require modification to factory hoses to relocate the valve elsewhere in the engine bay. On the Supra JZA80 this is not a direct bolt-on and will require hose modification to install.
Key Features
- TMS technology for up to 30% quicker boost recovery
- Effectively holds unlimited boost pressure
- 100% recirculating (plumb back) configuration
- Optional atmosphere venting conversion kits available separately
- 20mm valve size
Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm your vehicle's year and hose configuration before ordering.
Not sure if this valve suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.
Vehicle Compatibility
| Make | Model | Chassis | Engine |
|---|---|---|---|
| Ford | Laser TX3 | - | - |
| Subaru | STI | GC8 | EJ20 |
| Subaru | WRX | GC8 | EJ20 |
| Toyota | Supra | JZA80 | 2JZ-GTE |
Technical Specifications
| Spec | Value |
|---|---|
| Valve Type | Recirculating (plumb back) blow off valve |
| Port Size | 20mm |
| Technology | TMS (Turbo Management System) |
| Boost Holding Capacity | Unlimited (no turbo can generate enough pressure to damage the valve) |
| Throttle Response Improvement | Up to 30% faster return to peak boost vs factory diverter valve when shifting gears |
| Conversion Option | Can be converted to atmosphere venting via optional Atmosphere Conversion Kit or trumpet outlets (6110, 5702) |
No instructions available for this product.
Need Help Finding the Right Part?
We’ll Track It Down for You
We know how frustrating it can be searching for the right part. If it’s not listed on our site, that doesn’t mean we can’t source it.
Fill out the quick form below and our team will track it down for you.