Mach 2 100% Recirculating Diverter Valve

The Go Fast T9125 Mach 2 TMS Recirculating Diverter Valve is an essential modification for turbocharger owners seeking improved boost response and performance. The Mach 2 addresses common issues with stock diverter valves, which can sometimes be designed to release pressure above a certain point to protect the engine or are not optimized for throttle response. The T9125 features a pressure-balanced design that can effectively hold unlimited boost, ensuring optimal performance under demanding conditions. Its recirculating nature means all bypassed air is sent back into the intake tract, maintaining a stealthy operation. Installation is straightforward as it is designed as a "bolt-on" solution, requiring no additional adaptors, parts, or vehicle modifications for many applications. Simply remove the factory bypass valve and install the Mach 2 in its place. The specific inlet and outlet sizes are 25mm. While many applications are universal, specific "bolt-on" kits are available for popular turbo models. The product page also lists extensive fitment details for various VW, Audi, Ford Australia, and Saab models, often noting the requirement for the atmosphere venting option kit (part number 5925) and whether two valves are required for certain configurations (e.g., Audi S4 B5 2.7 Biturbo).