Air and Fuel Superchargers, Turbochargers and Components

Go Fast

Mach 2 Diverter Valve

$198.90

SKU: T9111

Special Order
Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Go Fast Bits Mach 2 T9111 is a recirculating diverter valve designed as a direct bolt-on replacement for factory bypass valves.

This valve is capable of handling upwards of 110psi and is configured for full recirculation, with an optional atmospheric conversion kit available separately. It is compatible with vehicles that use a factory-installed hose-type flange or flange-mount pneumatically actuated bypass valve.
Show original supplier description
The Go Fast Bits Mach 2 TMS Recirculating Diverter Valve is engineered to provide quicker boost response and improved throttle performance for turbocharged vehicles. Utilizing GFB's proven TMS Technology, this valve ensures rapid boost recovery during gearshifts and maintains optimal throttle response. It is designed to withstand boost pressures exceeding 100psi, offering reliable performance under demanding conditions. This diverter valve is configured as a 100% recirculating unit, also known as a bypass or plumb-back valve. It serves as a direct replacement for the factory bypass valve, allowing enthusiasts to achieve enhanced performance without the characteristic noise of a vent-to-atmosphere blow-off valve. This makes it an ideal choice for those seeking a more subdued sound profile. The Mach 2 addresses common shortcomings of factory bypass valves, such as being designed to vent at specific pressure thresholds or lacking optimization for throttle response. Its pressure-balanced design allows it to hold virtually unlimited boost, ensuring it can handle the output of most turbos without compromise. This specific model, T9111, is a bolt-on kit designed for direct fitment on various Hyundai and Kia models, including the 2017+ Hyundai Kona (Gamma engine G4FJ), 2016-2020 Hyundai Elantra Sport/GT (1.6T-GDI), 2019-on Hyundai Veloster (1.6 GDI Turbo), 2018-on Kia Cerato (1.6 T-GDI), 2016-on Hyundai i30 SR/N-Line Hatch (1.6T-GDI), and the 2019-2020 Hyundai Tucson (1.6 GDI Turbo, facelift).
Vehicle Symptoms
  • Fluttering or chirping noise under boost
  • Loss of boost pressure
  • Sluggish acceleration
  • Check engine light on
  • Hesitation when shifting
Diagnostic Codes
  • P0234 – Engine Overboost Condition
Relevant Conversations
  • GFB Mach 2 vs Forge diverter valve
  • How to install GFB T9111 on WRX
  • Boost leak symptoms after turbo upgrade
  • P0234 engine overboost condition fix
  • Recirculating vs atmospheric BOV
  • GFB Mach 2 T9111 review
  • Diverter valve replacement cost
  • Best diverter valve for high boost
  • GFB Mach 2 install guide
  • Car fluttering under acceleration

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandGo Fast
Part NumberT9111
CategoryAir and Fuel

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