a few months ago I had the brakes done on my 02 GT, and the stock rotors and pads were replaced. Cut to now, I have been hearing a squeaking noise from my brakes, similar to a bed spring. I took it to my mechanic and it turns out that because I took my mustang on a track day and some auto crosses, I've trashed my brakes. The pistons don't close right, and the pads are cracked, I basically melted my brakes. If I want to keep racing I was told I would need to upgrade my brakes. What would be the most cost effective way I could fix this, or would it just be better to go all out and get Cobra R fronts or something along those lines?