Im looking at getting a drop in air filter from AEM. But im wondering if this is ok to use without a Tune? I know with turbo cars especially WRX's using a CAI without a tune can make the car run lean. Will a drop in be ok? Also looking to eventually get the Nameless Axleback no muffler 3.5 tips kit For my 2013 Hatch and im assuming for that i don't need a tune? Im not looking to get crazy horsepower right now just looking for a few extra horsepower and more sound! I also heard that the stock intake especially with a drop in is good for close to 350 to 400hp so no need for a CAI in my mind i don't ever see myself making more then that! So good to go or no i need a tune?