Direct-Fit Blow-Off / Diverter Valve with Adjustable Venting Bias for Subaru Turbo Models

The GFB Respons TMS T9001 replaces the factory bypass/diverter valve on the compatible Subaru applications listed below. It’s designed to give you control over how boost pressure is released during throttle lift, without forcing you into an all-or-nothing recirc or vent-to-atmosphere setup.

Set the Sound the Right Way

With the adjustable venting bias system you can run near-silent full recirculation, full atmospheric venting for maximum blow-off sound, or any balance in between. This makes it easier to get the sound you want while maintaining smooth behaviour on MAF-based setups.

Sharper Boost Recovery

The valve is designed to vent only what’s required, helping preserve boost where possible and supporting faster boost recovery after gear changes for a more responsive feel.

True Bolt-On Fitment

This is not a universal weld-on valve. The T9001 is supplied as a direct-fit solution for the Subaru models listed below, intended for the factory valve location on those applications.

Built for Daily and Modified Setups

Suitable for stock and performance builds, the Respons TMS design focuses on consistent sealing, repeatable operation and practical drivability.