Even with the 91 octane tune for the 2013, it will be a huge improvement over stock. You will be amazed at how much more performance is in the car. But my advice to you, is get that thing tuned now....the heck with the wedding, go with a smaller cake or only serve cold cuts at the reception instead of chicken. Having the car tuned is a much better investment the blowing it on the wedding.... :drive: The wedding is done and over in a day...the tune will last as long as you have the car....