GFB T9135 Mach 2 TMS Recirc Diverter Valve (35 mm) for 1997-1998 Subaru WRX/STi

Vehicle Fitment

• 1997-1998 Subaru Impreza WRX/STi (GC-GD, EJ20T, AWD)

Features

• 100 % recirculating Mach 2 design - quiet OEM operation
• TMS (Turbo Management System) enables up to 30 % faster boost recovery
• Pressure-balanced piston holds unlimited boost (100 psi+)
• Direct bolt-on - no mods or ECU tuning required
• Single recirc outlet prevents compressor surge
• CNC 6061-T6 aluminium body, black anodised finish
• ISO 9001-certified Australian manufacturing
• Capable of handling high boost reliably, with durability

Specifications

• Inlet/outlet: 35 mm inlet, 30 mm outlet (factory spec for GC/GD WRX/STi)
• Material: CNC-machined 6061-T6 aluminium, black anodised
• Valve type: recirculating piston (Mach 2)
• Boost holding: effectively unlimited (>100 psi) :contentReference[oaicite:9]{index=9}
• Weight & dimensions: ~0.56 kg; approx 6.3"x3.8"x6.6" (~16 x 9.7 x 16.8 cm) :contentReference[oaicite:10]{index=10}
• Incl. flange gasket & mounting bolts retaining factory orientation

Included Components

• 1x T9135 Mach 2 valve assembly (35 mm inlet/30 mm outlet)
• 1x mounting flange gasket
• 2x OEM-spec mounting bolts
• 1x small Allen key (for piston preload)
• 1x printed instruction sheet + downloadable PDF

Product Description

The GFB T9135 Mach 2 Diverter Valve is a high-performance, 100 % recirculating replacement designed explicitly for 1997-1998 Subaru Impreza WRX and STi models. Featuring GFB's Turbo Management System, it provides significantly faster boost recovery - up to 30 % quicker than the factory valve - without the added noise of atmospheric venting.

Constructed from durable CNC-machined 6061 aluminium with an anodised finish, this valve manages high boost pressures with ease. It bolts into the stock location using existing hardware and includes the flange gasket - no modifications or ECU tuning needed. Ideal for performance-focused owners seeking improved throttle response and reliability, while retaining stealthy operation.