You can do it yourself, if you're comfortable with it. It will bolt on where the RT spoiler was but will not match up with the belly pan. If you retain the RT's belly pan, you'll have to make new holes in it to secure it to the SRT spoiler. The other option would be to get an SRT bellypan for a complete change over which will allow for extra cooling to the front brakes.
A member of this forum, SPeedy, has a great video on the retrofit on his website. Check it out.:thumbsup:
If you are a mechanical type, busted knuckle club member it's a piece of cake. If your an Artsy Fartsy pencil pusher type you will find it somewhat difficult. It's always a lot of fun to do it yourself and you learn more about your car no matter what type you are.