Are there any other brake kits that can compare the the GTR kit?
I have a couple of customers running Stop tech big brake kits on their cars including this one a E92 M3 fully dedicated track car we built last year. This car is equipped with stop tech's trophy series big brakes system. He's told me that out on the track even during endurance events these brakes perform phenomenal, he's mentioned that out of all his race cars this one with the trophys is the best braking.
Feel free to PM me if you have any questions about the system.