Larger Brake Master Cylinder Needed?

[Kaido_RR]

Hey,

I recently purchases an AP brake kit for my car (ECR33). now im not sure if i will require a larger brake master cylinder. The information of the calipers are :

Piston Diameters: 38.1mm x 2 / 41.3mm x 2

Piston Area: 49.5cm²

the rotor size are 323 on the front.

Would i be best to upgrade to a GTR brake master cylinder?

thanks michael

edit: found this link at AP racing website: http://www.apracing.com/car/cylinder/index.htm