Manual master cylinder bore size help for right stuff brakes

[CamaroJesse]

I have the Right Stuff signature kit on my car. 13 inch rotors with 2 pot calipers up front and 12 inch rotors with 1 pot calipers out back. I am wanting to buy a manual master cylinder from wilwood but i am looking for advice on what bore size to go with.

thanks!

[andrewb70]

Assuming a 6:1 pedal ratio, either a 7/8 or 15/16 will work.

Andrew