[paulGT3]

Thanks Joe thats all I was asking. I was looking at the M3 and I was thinking HOW nice that would look with the nice caliper under there with the M badge on the side. That made me start thinking why does BMW not use the multi piston caliper. The M3 rotor looks very nice and sturdy. I can understand your point about the bigger rotors too. iron rotors are heavy and if you start getting huge rotors like the ones on my GT3 (380mm) would be very heavy. The stock GT3 iron rotors are 350mm.