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GFB Mach 2 TMS Blow off Valve T9103 - Subaru WRX, STI, Forester

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    GFB Mach 2 T9103 Diverter Valve/Blow off Valve (Can be configured to a 100% Vented BOV)

    To Suit:

    Subaru Impreza STi GDB-GGB EJ20T 02-07

    Subaru Impreza STi GDB-GGB EJ25T 02-07

    Subaru Impreza STi GR EJ25T 08-11

    Subaru Impreza STi EJ25T 14-on

    Subaru Impreza WRX GDA-GGA EJ20T 00-07

    Subaru Impreza WRX GDA-GGA EJ25T 06-07

    Subaru Forester XT SG Series 2 EJ25T 05-08

    GFB MACH 2 Diverter Valve / BOV

    Using GFB’s TMS technology the Mach 2 can help return the engine to peak boost up to 30% faster than a factory diverter valve when shifting gears (more information below).

    Recirculation model for direct factory replacement for performance without the noise

    Atmosphere venting kits to convert the recirculating valve if you want noise with your performance

    Like the Respons and Deceptor Pro II, the Mach 2 is available in a range of bolt-on kits for most popular turbo models. And when we say “bolt-on”, that’s exactly what we mean! No additional adaptors, parts or vehicle modifications are required – simply remove the factory bypass valve and replace it with the Mach 2 – it’s that simple!


    The Mach 2 is configured as a 100% recirculating valve (i.e. bypass, plumb back) and add on kits are also available to convert to 100% atmosphere venting. Use the recirc model for direct factory replacement when you want the performance WITHOUT the noise! Add the conversion kit when you want some noise with your performance!

    Factory bypass valves have two main shortcomings – one is that they are typically designed to start opening above a certain pressure to protect the engine, and the other is they are not optimised for throttle response. Oh, and you can’t vent them to atmosphere without stalling your engine…

    The Mach 2 solves all of these issues. It can effectively hold unlimited boost (unlimited in that no turbo could ever produce enough pressure to damage it), and the TMS technology ensures maximum throttle response. Oh, and you CAN vent with the atmo conversion to atmosphere without stalling your engine…

    Most Credit Cards accepted. We also welcome Internet banking. (Details Provided at checkout)

    Please provide your vehicle details at checkout so we can ensure you receive the right products.

    We welcome Internet banking. (Details provided at checkout)
    Many Payment and Finance options including Paypal, Afterpay, QMastercard (with interest-free for 6 or 12 months) and more, please see our “Payments& Finance” page for details.

  • **FREE FREIGHT NZ WIDE** RD Fee May Apply

    When purchasing any parts please include in the notes your vehicle details including make, model, year, and/or registration number (And any other details you may think are important). To ensure we get the right part to you.
    Please don't hesitate to contact us, so we ensure you get the right mags & tyres to suit both your vehicle and budget!

    All new mags & tyres are to full national standard, quality and load/speed ratings and come with full manufacturer replacement warranty.See our policies pages for more information!


    Most credit cards accepted, we also welcome internet banking

    **Signature Required Delivery**
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