GFB 5701 Whistling Trumpet is designed for Stealth FX and WRX Hybrid valve applications. It replaces the standard trumpet on compatible GFB valves to create a sharper whistling blow-off sound...
GFB 5701 Whistling Trumpet is designed for Stealth FX and WRX Hybrid valve applications. It replaces the standard trumpet on compatible GFB valves to create a sharper whistling blow-off sound when the valve vents under boost.
GFB 5701 Whistling Trumpet is designed for Stealth FX and WRX Hybrid valve applications. It replaces the standard trumpet on compatible GFB valves to create a sharper whistling blow-off sound when the valve vents under boost.