I just finished installing disc brakes around. I put C5's in the front and Wilwood's in the rear. Now I haven't touched my combination valve. Wilwood wants me to get their master cylinder with 1&1/8th" bore and comb/adj prop valve. Do I need it? I haven't even tested the brakes yet. My car didn't have rear disc's from the factory so I think I will at least have to get an adj prop valve.

Tell me what you think?

Thanks