I currently have a 2011 GTCS- CAI, Lethal Performance OffRoad X-Pipe , DMH Electric Cutouts And Flowmaster AxleBacks ! Should i trade it in for a 2015 GT ? What could i get as a trade in for my car ? It has 40K miles
Probable be better just selling private party or checking a few different dealerships for offers. When I traded in my last car I went to 3-4 dealerships and got offers between 14000-19500 so there's no way to know what they will give you unless you go in.
You'll be offered around $17k. Take off all aftermarket, it hurts the value and you can sell it.
You've got a sweet car with low miles. If it were me, I would wait for the first year of a model change.