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

SKU: GFB5701
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$56.99

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All parts come with the essentials you need for a smooth fit and clear instructions. From performance upgrades to custom styling, unbox and get your ride ready with confidence!

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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.