I bought this for performance and mileage. What I didn't expect was how my engine sound changed (love that!). I bought this with a throttle body spacer and an exhaust designed for my car. This air intake and spacers arrived first so I installed them before release. A completely different "roarβ at revs from 4000 to 6000 and a noticeable jump in torque in the same range. He pushed his wife and children against the backs of the seats and let out an audible screech. I've had it for a few years now, haven't tested my car so can't confirm any torque or horsepower gains. I can say that there is a noticeable increase. Once I was disciplined enough to keep my foot on the ground (which is hard) I saw the advertised MPG gain. (Rural highway/small town driving) I've seen an average MPG increase of 2-3 MPG. Worth the money. This is an easy upgrade using basic workshop tools.