Originally Posted by swamp2
I echo the comments above. Brakes are not really complex but are probably the most important safety feature on your car. In addition I can almost guarantee 400mm rotors will not fit 19" wheels, let along 18". My Brembo 380mm rotors actually have some slight intermittent scraping on my wheels.
+1 - brakes are one area where you should NEVER "go cheap"!
Also, adding an 8-p caliper with 400 mm rotors will most likely significantly increase the front unsprung weight - something you don't want!
Stick with Brembo, AP, Alcon, PFC or ST if you actually need a BBK...