If you want to keep your warranty. Headers and intake are best bang for your buck.
If you want to get an L99(auto) to 412 rwhp, you will need a cam.
But if you want to get close to his power, get LT headers, Intake, and some good tires.
A tune will help you immensely and help bridge any power gap that may be there after that.
If hes only got you by a car length, headers, cai, drag radials, and practice can get you there.