Ive had this turbo almost a year now. It really spools up fast and makes great torque around town. Im very surprised not to see any comments on this product for a couple of reasons. First, this is a easy way to make more power. Second, its a cheaper way to make power without having to buy a full complete aftermarket turbo kit thats very costly. And finally its safer on the engine because larger turbos (even though making more power) put more stress on the stock internals of the engine. I know everyone has different opinions but this performance mod has made my cobalt ss come to life and im loving every minute of it. lol!!! Also the guys at Perfomance Autowerks answered all the questions I had and really made this purchase an easy one. Thanks a bunch.