Just a review on the Wilwood, a friend has em on his TT Z , and he says they are junk. Endless, Stop-Tech, Rotora, AP Racing all have had good reviews in the US. From what I gather after talking with Stop Tech, 4 POT brakes are sufficent for the Z, the size of the rotor is really what counts for heat reduction. 355 Rotors with 4 Pot Calipers should be a great set up.