I installed a K&N intake a few months ago on my new Cruze. I have experienced much better fuel economy (5.5 L/100KM) on a highway trip maintaining 120kmh most of the way. It also gives the car a much more aggressive sound as well as letting you hear the turbo and blowoff very distinctly. Turns heads all the time for me. Anyone else done this? Install too about half an hour for me and a friend to do, and was very simple.