T9135 Mach 2 TMS Recirculating Diverter valve (35mm inlet, 30mm outlet - suits MY97-98 WRX/STi)

The simple and essential mod for 30% quicker boost

Softer spring (part # 6116) must be used or the valve will not open properly. Alternatively, the BOV vacuum hose can be teed into all four of the individual throttle bodies instead of just one.

Part Number: T9135

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Product Details Related Products Suitable For Fitting Instructions

Simply add an Atmospheric Conversion Kit for maximum noise (available separately).

All the Performance With or Without the Noise!

GFB’s Mach 2 utilises GFB’s proven TMS Technology to ensure rapid boost recovery on gearshift and optimum throttle response, as well as the ability to withstand boost pressures of 100psi+. Put simply, it can hold more boost than any turbo could produce.

With its single venting outlet, the Mach 2 is configured from the factory for full recirculation (i.e. plumb back, diverter, bypass) venting for the performance-minded who just want the benefits without the sound.

Single venting outlet, factory configured for full recirculating operation
Configure for full atmosphere venting with separate atmosphere conversion kit
TMS Technology for up to 30% faster boost recovery on gearshift
Huge range of direct bolt-on kits
100psi+ boost holding ability
Manufactured in Australia in accordance with ISO 9001

Complete Range of Fitment Options

The Mach 2 direct bolt-on range covers a huge list of popular vehicles. You can also purchase a variety of hose and flange adaptors for custom fitments.

Mach2 Valve Montage