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This listing is for Go Fast Bits Blow Off Valve Whistling Trumpet Attachment High Boost

Part Number 5701

Add a little outback to your classic liftback or give your modern ride an overhaul from down under with performance parts from Go Fast Bits (GFB)! Proudly designed, engineered, and manufactured in Australia, the company’s extensive range of high-quality offerings includes GFB blow-off valves, boost controllers, turbocharger turbine diverter valves, crankshaft pulleys, and more. GFB meticulously crafts every component at its own state-of-the-art CNC manufacturing facility using the highest-grade materials available and tests them to ensure exceptional performance and reliability. Order today and give your vehicle the performance...

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.

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