Sorry but that isn't correct, it takes the same pressure at the calipers to create the friction to stop the car. Power boosted, just means that you don't have to apply as much force on the pedal, the booster does the work. On a manual brake system, you have to apply more force on the pedal to get an equal amount of friction. That is one of the reasons that the brake pedal needs to be modified on a manual system, to increase the leverage on the master cylinder.There are individual Wilwood .75 master cylinders for front/rear. I could not get much out of Factory Five tech support other than replacing the master cylinders or going to a different brake pad. The FF guy said that as far as he knows PBR does not provide any technical support for the public. The aforementioned calipers are for 99-02 Cobra Mustangs. He said 1200 psi was for power brake systems. He didn't know the manual brake psi, but it would be quite a bit lower. Adding a power booster was another option he noted.