I've fitted 4pot 2wd calliper and 286 disks @ the front and sierra xr4 256 mm disks and callipers @ the rear.
rear works verry well but the front doesn't seem to brake verry wel so they say when it was for MOT this morning.
Anyone else got this problem?
Could the master brake cilinder be to smal, and what can i fit instead.. cosworth or something else?

thanks..