Another great product from K&N. This intake system was easy to install on a G37 IPL. Just followed the directions and was done in less than an hour. Increased HP from 349 to 362 (verified on a dyno). Don't know whether it increased gas mileage or not because my driving habits aren't for fuel consumption. Love the looks, the sound, and I felt the power difference right away. I have always liked and used K&N products and this one did not disappoint me. Amazon price was incredible. Received it in just 3 days after ordering it on regular ground delivery.