GFB Mach 2 TMS Recirculating Diverter Valve - Subaru 01-07 WRX / 02+ STi / 05-08 XT Forester

If you're looking to get the most out of your turbocharged Subaru Impreza, WRX, STi, or Forester without adding extra noise, the GFB Mach 2 TMS Recirculating Diverter Valve is a solid option. This valve is designed to help your turbocharger maintain boost pressure between gear shifts and improve throttle response, giving you a more consistent and engaging driving experience. It's built to handle boost pressures well over 100psi, meaning it can hold more boost than your turbo could ever produce.

The Mach 2 comes from the factory set up for full recirculation, meaning all the vented air goes back into the intake system. This setup gives you the performance benefits of a diverter valve—like quicker boost recovery and better throttle response—but without the characteristic "pssh" sound you get from atmosphere-venting valves. This makes it a great choice if you want improved performance but prefer a quieter operation. It's a direct bolt-on part for many popular Subarus, making installation straightforward.