Hi, I am fully aware of what turbo/compressor surge is and that it is BAD for your turbo. I have heard a few of these SHEEPDOG BOV's (Prof) and they sound awesome...that 'tekurkur' sound  
Is this sound from this BOV its own signature sound or is it surge? Anyone using this on their 3SGTE?
Here is a link...using the SHEEPDOG bov:
http://www.downloaddailymotion.com/video/21337169-s15-bov.html