A BBK is the easy button if you have the economic ability. All I'm saying is what we have stock is better than lots of cars out there. Granted, you can get away without having cooling ducts longer with huge heat sinks and most importantly, they look so cool! I had 2 problems with my stock brakes. First was the fluid because I didn't get a cool down lap and when I got in the car later for another heat I had no brakes. In went Motul RBF 600. Next I melted my Porterfield RS4's on a high speed track. They got too hot and melted. Gone in 20 minutes. Neither were caused by the stock brake hardware not being up to the task but by stock fluid and pads not up to the task. Our front rotors are 330mm. The AMG upgrade is 345mm and Stoptech's are 355mm. If you really use the brakes they'll need to be rebuilt at least every 2 years. I've replaced my Stoptech rotors once already ($800) and did a rebuild on the calipers. The rubber parts get brittle and crack from the heat. It's cheaper to stay with stock hardware and buy the best fluid and correct pads for the job.

Les