So I cud essentially go 4 say std 1.8/2.0 rear discs for my car 4 the look I'm after but run bigger discs up front when I put the bigger 2.0ltr in. I queried the master cylinder as I spoke 2 EBC tech as they say I need 2 change said item 2 cope or as u say run a pressure reduction valve which I think may be a cheaper option but ne ideas peeps on where 2 get one?