GFB Whistling Trumpet (suits all valves)
Available to ship (11+)
GFB Whistling Trumpet
for GFB Respons and Deceptor Pro II Valves (excluding part number T9003 and T9503)
The GFB Whistling Trumpet offers the ability to change the sound of a blow-off valve, changing the sound of a BOV has been increasingly becoming an important issue with buyers, who want to sound different from everyone else.
Back in 2004, GFB had released the Whistling Trumpet part number 5701, which emitted a piercing screech when driving aggressively. Unfortunately for a number of GFB owners, the 5701 trumpet only worked with a certain type of valves.
For the owners of all other types of GFB valves, the part number 5702 is a modified version of the Whistling Trumpet that is designed to work on low boost applications where the 5701 doesn’t cut it.
The 5702 can be used in place of the standard trumpet on all GFB valves, and will make the whistling sound more readily than the 5701 (high boost and RPM is required to get the whistle from a 5701), and at a slightly higher pitch. Like the 5701 however, it is necessary to run the valve so that all (or most) of the air vents through the trumpet – Respons valves will typically not generate the velocity required to whistle when set to 50/50 venting.
This part is recommended for GFB Respons and Deceptor Pro II valves EXCLUDING T9003 & T9503