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GFB Whistling Trumpet (only for Stealth FX and WRX Hybrid)

Save $4.09 Save $4.09
Original price $40.95
Original price $40.95 - Original price $40.95
Original price $40.95
Current price $36.86
$36.86 - $36.86
Current price $36.86
The 5701 can be used in place of the standard trumpet on GFB valves (Part numbers T9003 & T9503), and will make a whistling sound. 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.