Review on AEM 21-748C Gunmetal Cold Air Intake System: Enhanced Performance and Efficiency by Rudy Barron

It makes my car hum more than purr. I noticed that the car responded better to the accelerator pedal. It's not a big difference but I've had the same car for 4 years and I can feel the difference. I've been tracking and I'm getting about a 2mpg improvement in gas mileage. Nothing special, but it's nice to be back on the Autobahn in your 30s after the car has aged a bit. I drive a 2015 Fit.