I have the EX civic front brake upgrade on the wagon and the MC is leaking into the brake booster, so both should be changed. I was reading into the 90 Teg non ABS MC/BB upgrade or the EX civic MC with stock brake booster. Price set aside, what are your opinions on which upgrade to go to? Should I change the prop valve also? I have the stock wagon one with stock rear drums.

 

If you have the front brakes from an EX and the stock rear drums you might as well upgrade your wagons system to mirror the EX. Use the EX m/c and booster and the EX prop valve(if its diff.)