GFB 5701 Whistling Trumpet – Replacement BOV Sound Enhancer

GFB 5701 Whistling Trumpet – Replacement BOV Sound Enhancer

The GFB 5701 Whistling Trumpet by Go Fast Bits is designed for enthusiasts who want their turbocharged vehicle to stand out with a unique blow-off valve sound.

This replacement trumpet produces a distinct piercing whistle under aggressive throttle, giving your GFB valve a signature note that’s instantly recognisable.

🔧 GFB 5701 Whistling Trumpet – Replacement BOV Sound Enhancer  Features & Benefits

• Unique Whistling Sound – Emits a piercing “screech” when venting
• Replacement Trumpet – Fits selected GFB blow-off valves (see compatibility)
• Sound Customisation – Designed for users wanting a different BOV sound
• High-Quality Construction – Precision-machined for reliable performance
• Easy Install – Direct replacement for standard trumpet

🚗 Compatibility (Verified)

Recommended for the following GFB blow-off valves:

• Respons Series – T9003
• Deceptor Pro II Series – T9503

Note:

• For full whistling effect, most (or all) air must vent through the trumpet.
• Respons valves may not generate sufficient airflow to whistle when set to 50/50 venting.

⚙️ Product Overview

 It’s perfect for street or track cars where the BOV note is an integral part of the driving experience.