GFB Whistling Trumpet – GFB Response/Deceptor Pro BOV – Black High Boost

GFB Whistling Trumpet – GFB Response/Deceptor Pro BOV – Black High Boost

Application: GFB Response/Deceptor Pro BOV
Part Type: Whistling Trumpet – Black High Boost

GFB built its reputation on giving blow off valves a distinct voice, and the Whistling Trumpet is the result of years of customer requests for something different. Fitted to a GFB Response or Deceptor Pro BOV, this black trumpet delivers a sharp whistling note under hard acceleration instead of the standard hiss.

This listing covers SKU 5701, a direct replacement trumpet designed for GFB valves T9003 and T9503. It swaps straight in over the factory trumpet without needing extra tools or modification.

Note: To generate the whistle, the valve needs to be set so most or all boost vents through the trumpet. Response valves running a 50/50 vent split typically won't build enough velocity to whistle properly.

Key Features

• Black finish trumpet for GFB Response and Deceptor Pro BOVs
• Produces a distinct whistling tone under boost
• Direct replacement for the standard trumpet
• Compatible with GFB part numbers T9003 and T9503
• Simple bolt on installation, no modification required

Vehicle Fitment

• Suits GFB Response/Deceptor Pro BOV

Please confirm your GFB valve model before ordering.