GFB Nissan Skyline (GTS-T) Deceptor Pro II - Blow Off Valve Venting Bias KitBrand Go Fast Bits Part Number T9502 Category Forced Induction Blow Off Valves Condition Brand New Original Manufacturer Packaging Control the sound of your BOV "ON THE FLY" Go on, admit it. There are times you wish you could have that signature turbo blow off sound, but you're not prepared to listen to it all the time. GFB's Deceptor Pro II delivers just what you need ? the ability to control how loud your BOV sound is, from the driver's seat. To top