as the title says i have a 1.1 with 195/45/15 tyres on it, currently it has the standard discs and my brakeing is sh!* as a result (well i think its the tyres fault, it blead clean and the pads are fine)

so my question is what discs and calipers can i use to improve my brakeing, ideally im looking for somthing that will just bolt right on, so im thinking either standard frst/xr2i or 1.6 focus discs and calipers, as its only a 1.1 im not going to need huge brakeing power so i think these will be ok provided they fit.

also will i need a new master cylinder or is my current one fine

thanks