no, 6A10 is lancer body, so is 100 pcd.
yes, people look for better stopping from disc is because most of them are upgrade to so powerful engine, biggest sport rim and etc .. so they need to look for biggest disc and caliper , front will go to 4 pot and rear atleast 2 pot. Furthermore did u see that most of the performance disc set normally is biggest than our oem disc set atleast 2inch ?? This due to biggest caliper coz,they need more gripping area.
my v6 break pump is just single layer like local 1.5 once....
above is just for discussion and opinion ... not for arQ ... :D