I'm running a Turbosmart dual port BOV with my Vortech SC. I blocked off one of the ports with the included plug and run either the horn for the "whoosh" sound or the recirc fitting with a breather filter if I want it quiet. Best of both worlds and takes 10 seconds to switch it out with no tools
Here's a couple of 4th gear flybys at the track
http://instagram.com/p/oYkefSMoqz/