GFB Mach 2 T9125 TMS Recirculating Diverter Valve - Universal (25/25mm)

Blow off sound not to your taste? Want something as “sleeper” as possible? Then the GFB Mach 2 is the valve for you!

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.

The Mach 2 is available in a range of universal and bolt-on kits for most popular turbo models. 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) as a direct factory replacement, for when you want all the performance WITHOUT the noise!

Why replace the factory bypass valve? Better performance! Factory bypass valves typically have two main shortcomings – one is that they are often designed to blow open above a certain pressure to protect the engine, and the other is they are not optimised for throttle response.

The Mach 2 solves both issues. With its pressure-balanced design, the Mach 2 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.

Application (Universal, but also tested on):

VW Passat B5-B5.5 1.8t 96-05 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
AUDI B5 (1995-2001) 1.8t Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
AUDI B5 (1995-2001) 1.8t
SAAB 9-5 Turbo 98-09
SAAB 9-5 Turbo 98-09
VW Golf GTI Mk4 1.8t 97-05 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
SAAB 9-3 Turbo 98-02
AUDI TT 8N 1.8t 98-06 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
AUDI TT 8N 1.8t 98-06
AUDI TT 8N 1.8t 98-06 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
AUDI TT 8N 1.8t 98-06 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
VW Polo GTI Mk4F (Typ 9N3) 1.8t 05-09 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
SAAB 9-5 Turbo 98-09
AUDI S3 8L (1999-2003) 1.8t Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
AUDI B5 (1995-2001) 1.8t Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
AUDI B5 (1995-2001) 1.8t
SAAB 9-3 Turbo 98-02
SAAB 9-3 Turbo 98-02
VW New Beetle 1st Generation 1.8t 99-On Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
SAAB 9-3 Turbo 98-02
SAAB 9-3 Turbo 98-02
SAAB 9-5 Turbo 98-09
AUDI B6 (2001-2005) 1.8t Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
SAAB 9-3 Turbo 98-02
SAAB 9-5 Turbo 98-09
AUDI S3 8L (1999-2003) 1.8t Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
SAAB 9-5 Turbo 98-09
AUDI B6 (2001-2005) 1.8t Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
AUDI TT 8N 1.8t 98-06 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
SAAB 9-5 Turbo 98-09
FORD AUSTRALIA XR6 BA-BF 4.0L Turbo 02-08 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
FORD AUSTRALIA XR6 BA-BF 4.0L Turbo 02-08 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
MAZDA SP Turbo 2002 (150kW/200hp)
AUDI 8L (1996-2003) 1.8t Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
FORD AUSTRALIA Territory SY 4.0L Turbo 06-11 Note : When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Sides.
AUDI S4 B5 (Typ 8D) 2.7 Biturbo 97-01 (Two Valves Required)
FORD AUSTRALIA XR6 FG 4.0L Turbo 08-On
VW Bora MK4 1.8t 00-05