Well, It does add some power to my butt dyno, and I am going to Gtech it tonight or tommorow for some numbers.
But so far, installation was not all that easy. It only came with one O2 sensor bung. The mid pipe hanger bar didn't even come close to matching up, and the rear mffler section was about 3 inches short and the muffler tip is also 3 inches to short.
And no it is not an impreza kit.
Its alot quieter than I expected.
But that will change.