GFB 5701 BOV Whistling Trumpet suit Stealth FX/Deceptor Pro/Respons

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.

Go Fast Bits (GFB)

Go Fast Bits (GFB) is an Australian manufacturer of performance components for turbocharged and modified vehicles. The GFB range includes blow-off and diverter valves, boost-control products, short-shift systems, pulley kits and other performance hardware designed for enthusiast street cars and motorsport applications. With a strong focus on engineering, adjustability and application-specific design, GFB products provide practical upgrade solutions for drivers looking to improve boost control, response, sound and the operation of their vehicle's performance systems.