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

GFB Whistling Trumpet - GFB Response/Deceptor Pro BOV - 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 compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm your GFB valve model before ordering.

Not sure if this suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.