wow thats like exactly oposite of the norm lol haha.... usually its gt sides and cobra bumper....i have turndowns so i kept the gt rear looks better to me.. but the side skirts are different the gt have the openings in front of the front wheel and in front of the rear wheel cobras are flat. and oviously dont say mustang gt
I plan on doing the same thing. My reasons are b/c:
1. I run dumps, so I think, the GT bumper looks better
2. One of my skirts under the door is cracked - I've repaired and repainted the GT skirts once, but the crack came back.
3. I noticed the back piece on the GT skirts gets chipped up really easy, b/c it sticks out. The Cobra skirts don't have any pieces that stick out and I assume they'd hold up longer.