Air intake change?

You would be much better off leaving it stock. None of the common "cold air kits" actually help in any way, and most hurt. That is because the stock airbox pulls air from outside the engine bay where it is cooler. Plus it helps smooth air entry into the engine by making it less turbulent. The air filters most of them use are also worse at filtering the air because of the larger openings in them. The stock filter does a better job, quieter and it already flows more air than the engine can use even at wide open throttle. What the CAI does do is make you hear the air intake, even to the point of being annoying. But it's your vehicle.