Retrofitting M pack 2 (convertible pre LCI). Which items are needed?

So I have the bumpers (front with mesh and fog lights, rear with defuser and parking sensors), side skirts and truck lip. I also have for front the air ducts and bumper fender liners. For the rear I have the 2 attachment plastic things to be bolted on to the car and also the bumper liners. Is there anything else I will need? I read somewhere about an alternator duct?