Direct-Fit Blow-Off / Diverter Valve with Adjustable Venting Bias for Nissan 200SX S14/S15

The GFB Respons TMS T9004 replaces the factory bypass valve on the Nissan 200SX S14/S15 SR20DET with a stronger, adjustable valve that gives you control over how boost pressure is released during throttle lift.

Adjust the Blow-Off Sound

The venting bias adjustment lets you change the balance between recirculating air back into the intake (quiet, factory-like operation) and venting to atmosphere (louder blow-off sound). Set it anywhere in between to suit your setup and preference.

Performance-Focused Valve Control

The valve is designed to stay closed until venting is required, helping preserve boost where possible and supporting quicker boost recovery after shifts for a sharper response.

Direct-Fit Installation

This is not a universal weld-on valve. The T9004 is supplied as a bolt-on kit for the compatible vehicle listed below, fitting in the factory valve location without fabrication.

Built for Real-World Driving

Suitable for street cars and modified setups, the Respons design aims to provide sound and performance without sacrificing drivability.