Lol, i dont know. This one is says its 3.5" but when actually measured its 3.25". Im gonna get a 3.25" v band flange and weld a 3" pipe to it, it will be fine im sure. Yea i know what you mean about too much shaft play, when the turbine hits the compressor housing, thats a little too much!! lol. Idk, time will tell but as you said before, you can literally buy 5 of the ebay ones to 1 brand name one. When it comes down to it though, turbos dont last as long as the m90, but you would be crazy to think it could. It has much harder environment to live in with the hot exhaust and other things. Im hoping that because this is a large turbo that at 18 psi it will be barely working hard, extending its life.