Go Fast Bits Mach 2 TMS Recirculating Diverter Valve — 25mm Inlet/Outlet Universal Fit

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SKU: GFBT9125
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Go Fast Bits

Go Fast Bits engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Go Fast Bits lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Precision Boost Management for 25mm Systems

The Go Fast Bits (GFB) Mach 2 TMS Recirculating Diverter Valve is the gold standard for 25mm inlet/outlet turbo systems. Designed to replace weak factory diverter valves, this unit utilizes GFB's renowned Turbo Management System (TMS) technology to provide rapid boost recovery and razor-sharp throttle response.

Why Choose the GFB Mach 2?

  • Versatile Fitment: Designed for a wide range of vehicles including classic Audi A4, VW Golf, Passat, and Saab 9-3/9-5 models.
  • Bulletproof Construction: Capable of handling over 100psi of boost, making it the last diverter valve you will ever need to buy.
  • Recirculating Design: Maintains factory-style operation, ensuring your engine management system remains perfectly calibrated while improving performance.
  • Enhanced Throttle Response: Reduces lag by ensuring the valve closes instantly after a shift, keeping the turbo spooled and ready.

This valve is the ideal solution for enthusiasts looking to maintain a stealthy, factory-like sound while enjoying the performance benefits of a high-end aftermarket upgrade. Its robust internal design prevents the common failures associated with plastic OEM valves, such as diaphragm tearing or boost leaks. When you need reliable performance parts that stand the test of time, look no further than the selection at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2015-2016 Audi A3 Premium
2015-2016 Audi A3 Premium Plus
2015-2016 Audi A3 Prestige
1997-2005 Audi A4 Base
2003-2006 Audi A4 Cabriolet
2000-2006 Audi TT Base
1999-2001 Saab 9-3 Base
1999-2003 Saab 9-3 SE
2003 Saab 9-3 Vector
2003 Saab 9-3 Arc
2003 Saab 9-3 Linear
1999 Saab 9-5 SE
1999 Saab 9-5 Base
2000 Saab 9-5 Gary Fisher
2000-2001 Saab 9-5 2.3t
2000-2005 Saab 9-5 Aero
2002-2005 Saab 9-5 Linear
2004-2005 Saab 9-5 Arc
2006-2009 Saab 9-5 2.3t
2008-2009 Saab 9-5 Aero
2009 Saab 9-5 Griffin
1999-2003 Volkswagen Beetle GL
1999-2004 Volkswagen Beetle GLX
1999-2005 Volkswagen Beetle GLS
2001-2002 Volkswagen Beetle Sport
2002-2004 Volkswagen Beetle Turbo S
2014-2015 Volkswagen Beetle Base
2015 Volkswagen Beetle Classic
2015-2016 Volkswagen Beetle Fleet Edition
2016 Volkswagen Beetle Denim
2016 Volkswagen Beetle Wolfsburg Edition
2016-2017 Volkswagen Beetle Dune
2016-2017 Volkswagen Beetle S
2016-2017 Volkswagen Beetle SE
2016-2017 Volkswagen Beetle SEL
2017 Volkswagen Beetle #PinkBeetle
2017 Volkswagen Beetle Classic
2000-2001 Volkswagen Golf GTI GLS
2000-2001 Volkswagen Golf GLS
2002 Volkswagen Golf GTI 337
2002-2005 Volkswagen Golf GTI 1.8T
2003 Volkswagen Golf GTI 20th Anniversary
2000-2004 Volkswagen Jetta GLS
2001 Volkswagen Jetta Wolfsburg Edition
2003 Volkswagen Jetta Wolfsburg Edition
2003-2004 Volkswagen Jetta GL
2004 Volkswagen Jetta GLI
1998-2005 Volkswagen Passat GLS
2003-2005 Volkswagen Passat GL
2004-2005 Volkswagen Passat GLS 4 Motion

Product Details

Product Description
Part Numbers
Sizing & Fit

About Go Fast Bits

Go Fast Bits engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Go Fast Bits lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Precision Boost Management for 25mm Systems

The Go Fast Bits (GFB) Mach 2 TMS Recirculating Diverter Valve is the gold standard for 25mm inlet/outlet turbo systems. Designed to replace weak factory diverter valves, this unit utilizes GFB's renowned Turbo Management System (TMS) technology to provide rapid boost recovery and razor-sharp throttle response.

Why Choose the GFB Mach 2?

  • Versatile Fitment: Designed for a wide range of vehicles including classic Audi A4, VW Golf, Passat, and Saab 9-3/9-5 models.
  • Bulletproof Construction: Capable of handling over 100psi of boost, making it the last diverter valve you will ever need to buy.
  • Recirculating Design: Maintains factory-style operation, ensuring your engine management system remains perfectly calibrated while improving performance.
  • Enhanced Throttle Response: Reduces lag by ensuring the valve closes instantly after a shift, keeping the turbo spooled and ready.

This valve is the ideal solution for enthusiasts looking to maintain a stealthy, factory-like sound while enjoying the performance benefits of a high-end aftermarket upgrade. Its robust internal design prevents the common failures associated with plastic OEM valves, such as diaphragm tearing or boost leaks. When you need reliable performance parts that stand the test of time, look no further than the selection at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2015-2016 Audi A3 Premium
2015-2016 Audi A3 Premium Plus
2015-2016 Audi A3 Prestige
1997-2005 Audi A4 Base
2003-2006 Audi A4 Cabriolet
2000-2006 Audi TT Base
1999-2001 Saab 9-3 Base
1999-2003 Saab 9-3 SE
2003 Saab 9-3 Vector
2003 Saab 9-3 Arc
2003 Saab 9-3 Linear
1999 Saab 9-5 SE
1999 Saab 9-5 Base
2000 Saab 9-5 Gary Fisher
2000-2001 Saab 9-5 2.3t
2000-2005 Saab 9-5 Aero
2002-2005 Saab 9-5 Linear
2004-2005 Saab 9-5 Arc
2006-2009 Saab 9-5 2.3t
2008-2009 Saab 9-5 Aero
2009 Saab 9-5 Griffin
1999-2003 Volkswagen Beetle GL
1999-2004 Volkswagen Beetle GLX
1999-2005 Volkswagen Beetle GLS
2001-2002 Volkswagen Beetle Sport
2002-2004 Volkswagen Beetle Turbo S
2014-2015 Volkswagen Beetle Base
2015 Volkswagen Beetle Classic
2015-2016 Volkswagen Beetle Fleet Edition
2016 Volkswagen Beetle Denim
2016 Volkswagen Beetle Wolfsburg Edition
2016-2017 Volkswagen Beetle Dune
2016-2017 Volkswagen Beetle S
2016-2017 Volkswagen Beetle SE
2016-2017 Volkswagen Beetle SEL
2017 Volkswagen Beetle #PinkBeetle
2017 Volkswagen Beetle Classic
2000-2001 Volkswagen Golf GTI GLS
2000-2001 Volkswagen Golf GLS
2002 Volkswagen Golf GTI 337
2002-2005 Volkswagen Golf GTI 1.8T
2003 Volkswagen Golf GTI 20th Anniversary
2000-2004 Volkswagen Jetta GLS
2001 Volkswagen Jetta Wolfsburg Edition
2003 Volkswagen Jetta Wolfsburg Edition
2003-2004 Volkswagen Jetta GL
2004 Volkswagen Jetta GLI
1998-2005 Volkswagen Passat GLS
2003-2005 Volkswagen Passat GL
2004-2005 Volkswagen Passat GLS 4 Motion

Product Details

Product Description

About Go Fast Bits

Go Fast Bits engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Go Fast Bits lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Precision Boost Management for 25mm Systems

The Go Fast Bits (GFB) Mach 2 TMS Recirculating Diverter Valve is the gold standard for 25mm inlet/outlet turbo systems. Designed to replace weak factory diverter valves, this unit utilizes GFB's renowned Turbo Management System (TMS) technology to provide rapid boost recovery and razor-sharp throttle response.

Why Choose the GFB Mach 2?

  • Versatile Fitment: Designed for a wide range of vehicles including classic Audi A4, VW Golf, Passat, and Saab 9-3/9-5 models.
  • Bulletproof Construction: Capable of handling over 100psi of boost, making it the last diverter valve you will ever need to buy.
  • Recirculating Design: Maintains factory-style operation, ensuring your engine management system remains perfectly calibrated while improving performance.
  • Enhanced Throttle Response: Reduces lag by ensuring the valve closes instantly after a shift, keeping the turbo spooled and ready.

This valve is the ideal solution for enthusiasts looking to maintain a stealthy, factory-like sound while enjoying the performance benefits of a high-end aftermarket upgrade. Its robust internal design prevents the common failures associated with plastic OEM valves, such as diaphragm tearing or boost leaks. When you need reliable performance parts that stand the test of time, look no further than the selection at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2015-2016 Audi A3 Premium
2015-2016 Audi A3 Premium Plus
2015-2016 Audi A3 Prestige
1997-2005 Audi A4 Base
2003-2006 Audi A4 Cabriolet
2000-2006 Audi TT Base
1999-2001 Saab 9-3 Base
1999-2003 Saab 9-3 SE
2003 Saab 9-3 Vector
2003 Saab 9-3 Arc
2003 Saab 9-3 Linear
1999 Saab 9-5 SE
1999 Saab 9-5 Base
2000 Saab 9-5 Gary Fisher
2000-2001 Saab 9-5 2.3t
2000-2005 Saab 9-5 Aero
2002-2005 Saab 9-5 Linear
2004-2005 Saab 9-5 Arc
2006-2009 Saab 9-5 2.3t
2008-2009 Saab 9-5 Aero
2009 Saab 9-5 Griffin
1999-2003 Volkswagen Beetle GL
1999-2004 Volkswagen Beetle GLX
1999-2005 Volkswagen Beetle GLS
2001-2002 Volkswagen Beetle Sport
2002-2004 Volkswagen Beetle Turbo S
2014-2015 Volkswagen Beetle Base
2015 Volkswagen Beetle Classic
2015-2016 Volkswagen Beetle Fleet Edition
2016 Volkswagen Beetle Denim
2016 Volkswagen Beetle Wolfsburg Edition
2016-2017 Volkswagen Beetle Dune
2016-2017 Volkswagen Beetle S
2016-2017 Volkswagen Beetle SE
2016-2017 Volkswagen Beetle SEL
2017 Volkswagen Beetle #PinkBeetle
2017 Volkswagen Beetle Classic
2000-2001 Volkswagen Golf GTI GLS
2000-2001 Volkswagen Golf GLS
2002 Volkswagen Golf GTI 337
2002-2005 Volkswagen Golf GTI 1.8T
2003 Volkswagen Golf GTI 20th Anniversary
2000-2004 Volkswagen Jetta GLS
2001 Volkswagen Jetta Wolfsburg Edition
2003 Volkswagen Jetta Wolfsburg Edition
2003-2004 Volkswagen Jetta GL
2004 Volkswagen Jetta GLI
1998-2005 Volkswagen Passat GLS
2003-2005 Volkswagen Passat GL
2004-2005 Volkswagen Passat GLS 4 Motion

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