The "Mintex" brand of race pads are referred to by the compound # "M171". These pads are their equivalent to the Ferodos but they are harder still for the very serious racers and work best when they're heated, exactly when stock pads begin to fade.
I know I keep dragging this one out for an airing but it’s continually ignored by far too many folk - the only way to get the best from what you have is to be totally honest with yourself about your Mini’s main usage. Delusions of grandeur cause severe disappointment, and tears before bedtime. Fitting a set of pads to your road Mini because you think you drive like Michael Schumacher, and your Mini’s built around a ‘race’ theme, with ‘race-spec’ brakes is going to get you into severe bother. Nine times out of ten they won’t work properly.