As soon as i put it on i could tell a difference both sound and the feel of the acceleration. Plus it looks sweet imo. Install was a piece of cake, although i didn't really like where they put the coolant resevoir, i have the chrome catch can now instead. i finally got my car dynoed today, and with a mazda speed axle back, the typhoon intake, and an OBX exhaust header I ran 120hp at something like 5800rpm, and 130 peak torque at about 3500 rpm. So definate gains over stock, but not sure how much for the intake alone.