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GFB Performance Turbo Tuning Products offer the ultimate in performance parts: BOV, Blow-off valve, wastegate, boost controller, short shifter, pulley kits and more ...

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Hear for yourself how GFB blow off valves sound!

5701 Whistling trumpet drive-by
Sound clip of the Respons TMS blow off valve with a whistling trumpet installed, 15psi boost on a WRX, recorded from the road side.
5701 Whistling trumpet in-car
Sound clip of the Respons TMS blow off valve with a whistling trumpet installed, 15psi boost on a WRX, recorded from inside the car.
Standard Trumpet Driveby
Sound clip of the Respons TMS blow off valve with a standard trumpet installed, 15psi boost on a WRX, recorded from the road side. This sound is the same as a Mach 1.
Standard Trumpet In-car
Sound clip of the Respons TMS blow off valve with a standard trumpet installed, 15psi boost on a WRX, recorded from inside the car. This sound is the same as a Mach 1.
Standard trumpet free revving
Sound clip of the Respons TMS blow off valve with a standard trumpet installed, free revving the engine in neutral. Recorded from in front of the car.

 

Note: The standard trumpet on the Respons TMS is the same trumpet that is fitted to all of the other blow off valves in the GFB range. The different models all make the same sound, only the volume level varies.
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