Adjustable Sound Without Compromising Performance

Turbocharged Mitsubishi and Subaru engines rely on effective bypass valve control to maintain boost response and turbocharger reliability. Factory valves often degrade over time, leading to boost leaks, slower response, and inconsistent operation.

The GFB T9233 Hybrid Dual Outlet Valve addresses these issues by replacing the factory valve with a durable, adjustable solution that allows you to tailor sound while maintaining proper boost control.

Hybrid Dual Outlet Design

The T9233 features a hybrid valve configuration that allows air to be both recirculated and vented to atmosphere. By adjusting the venting bias, you can move from quiet, factory-style operation to a more aggressive blow-off sound without sacrificing drivability.

Key Benefits

• Adjustable recirculation-to-atmosphere venting bias
• Improved boost holding compared to factory valves
• Sharper throttle response and faster boost recovery
• Durable construction for high-boost and high-heat conditions
• Suitable for stock or modified turbo setups

Designed for Performance and Longevity

Built using robust materials and proven GFB valve design principles, the T9233 is engineered to handle sustained boost pressure and repeated heat cycles that commonly cause factory valves to fail.

Direct Replacement Upgrade

The T9233 installs as a direct replacement for the factory bypass valve system on compatible vehicles, requiring no permanent modifications and integrating cleanly with the existing intake system.