They recently launched this product half a year ago.
I bought it and it's a bit much for my taste. I installed it Apr.8.2013 and drove it for approx 100km.
There is a resonator in the midpipe, so it's not as loud as the race version. I believe it's similar to the street version except you get dual pipes. Also comes with silencers to put on.
This guy on NASIOC owned several exhausts and sums it up pretty well.
2011 WRX Sedan Exhaust Reviews! Invidia N1 , Q300, Nameless Performance! - NASIOC
Stainless steel tip
Picture for reference.