Alcon brake upgrade for V5 sti wagon
 

After a bit of advise,I may have a change to buy some 2nd hand Prodrive
(Alcon made?) 4 pot callipers with a set of 330mm discs and pads,pads have
6mm of material on them.
Question is , as I already have 294mm 4 pots on my wagon,would these be a massive difference?
Its only for road use,no track days but car is heading towards 330bhp
Also what sort of prices are replacement pads?

Thanks in advance

Neil