OK. So I have 2x 2004 VY2 Commodore Wagons. 1st. Is an Executive Model but is Police Spec. (Ex QAS remote area fast response vehicle). 2nd. Is a Berlina. So I have some questions about the brakes on both. Do both have the same bolt on Disc's? Or are they different sizes etc? I've read that the brake pads on the Police spec vehicles have a larger surface area for better braking? Does this mean they are a different pad fitting? Or is everything interchangeable? I bought some Bendix Ultimate Pad's on sale a while back but the part number was just for a standard Commodore. If there is a difference in what fits what, I've also heard that there are after market Pol spec pads for the standard callipers but have the increased pad surface area? I believe the Pol Spec callipers have extra pistons?? Any explanations quoting parts numbers etc if there is a difference would be helpful. Any recommendation's on where to buy the better pad's at a good price also appreciated. .-.-.