So I rented the 2015 street glide this weekend and I loved it ! My question is can I purchase an older one 2011 or 2012 and then swap out the front fairing to have the navigation and controls like the 2015 ?!

 

Nope!

 

Buy a low mileage 14 or 15 ... Or a retired rental bike ... Check Craigslist in metropolitan areas for low mileage private sale bikes if you don't want to do the dealership thing.

 

There's a big diff between the '15 and any pre-rushmore bike. My guess is that you would be disappointed in any older SG after experiencing the '15.

 

Welcome to HDF. There were major changes introduced on the 2014 bikes, of which the nav and controls etc are only one, of many. Other great improvements are new bags and front forks, I doubt if you will find that an earlier bike compares very well.