Respons T9003 Diverter (WRX MY01-07, STi MY02-on, XT Forester MY05-08)

🔧 Product Description

The GFB Respons TMS Direct-Fit Diverter Valve is a high-performance OEM replacement upgrade designed for a wide range of Subaru WRX, STi, and Forester turbo models. Featuring patented Turbo Management System (TMS) technology, this dual-port diverter valve gives you complete control over boost venting behaviour, allowing seamless adjustment between silent OEM operation, full atmospheric blow-off, or anything in between.

Unlike factory valves, the Respons TMS is engineered to improve both performance and drivability on MAF-based Subaru engines, making it one of the most versatile and reliable upgrades available.

⚙️ Key Features

• Direct-fit replacement for factory Subaru diverter valve
• Patented TMS dual-port venting bias technology
• Adjustable venting: recirculation → atmospheric → hybrid
• Maintains OEM AFR stability and drivability
• No springs, tuning, or rebuilds required
• Designed specifically for MAF-sensitive turbo systems
• High-quality GFB construction for long-term durability

🚀 Performance Benefits

• Up to 30% faster boost recovery between gear shifts
• Improved throttle response and turbo spool
• Reduced turbo lag and compressor surge
• Stable boost control with no drivability issues
• Eliminates hesitation, stalling, and unwanted backfiring

🔬 TMS Technology

GFB’s Turbo Management System (TMS) keeps the valve closed under boost and only vents when required, reducing unnecessary airflow loss during gear changes. This results in faster spool recovery, stronger boost retention, and more consistent power delivery.

🚗 Fitment & Application

• Subaru WRX MY01–07
• Subaru STi MY02–On
• Subaru XT Forester MY05–08

🏁 Ideal For

• Subaru turbo performance upgrades
• OEM+ builds with adjustable sound control
• Drivers wanting improved response without sacrificing reliability
• MAF-based systems requiring stable airflow management

💡 Why You Might Need It

• Replace weak or leaking factory diverter valve
• Gain adjustable sound and performance control
• Improve boost response and drivability
• Upgrade to proven GFB TMS technology