I have a Perrin Red Recirculating Blow off Valve for 02-07 Subaru WRX/STi used only for a month...I decided to go with a VTA. This is one of the best BOV on the market...car wont stall or have any issues like other BOV...Perrin claims the technology can hold unlimited boost. Work perfectly looks great. This BOV is also Adjustable.
more info: Perrin Recirculating Blow off Valve (BOV) Kit for 02-09 WRX & 04-09 STi, JSC Speed Inc.
PM if interested...Thanks