Hey guys, i have a Baer brake kit for front and rear on my 97 EK hatch. Ive heard that it is worthwhile to upgrade the master cylinder and proportioning valve to go with the kit. The stock DX one is 13/16ths i believe and ive HEARD that an EX is 15/16ths. My question is what year/models are compatible for my car? Do i need one with 4 wheel discs? What proportioning vavle should i get and off of what car? Thanks a lot guys!