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

The GFB Respons TMS T9000 replaces the factory bypass/diverter valve on the compatible Subaru applications below with an adjustable valve that lets you control how boost pressure is released when you lift off the throttle.

Choose Your Sound Without the Downsides

Instead of being locked into full recirculation (quiet) or full vent-to-atmosphere (loud), the Respons design allows you to set the venting split anywhere in between. This makes it easier to get the sound you want while keeping stable everyday drivability.

Better Response Between Gear Changes

Because the valve is designed to stay sealed until it needs to vent, it can help preserve boost where possible and support faster boost recovery after shifts for a more responsive feel.

Built for MAF-Based Cars

On airflow-meter (MAF) cars, fully atmospheric valves can cause over-fuelling symptoms. The adjustable venting bias lets you run enough recirculation to keep behaviour clean while still gaining the blow-off sound you’re chasing.

Direct-Fit Installation

This is not a universal weld-on valve. The T9000 is supplied as a direct-fit kit for the Subaru models listed below, designed for the factory valve location on those applications.