Bought this for a 2008 Infiniti M35x and have been happy with it so far. The factory air system was too restrictive and this CAI really opened it up. For the install, the drive side wheel well had to come off and supposed to stay off but I didn't like that. I ended up modifying the wheel well cover by cutting a hole in the bottom of it and added "vent" holes as well so I could put the cover back on the car and still get the necessary air flow. Overall seems to be a great quality and I love it.