When using our 4 piston calipers on all four wheels we would recommend using our 1.125” bore master cylinder with a 6.5 to 1 pedal ratio. If you are using single piston or 2 piston calipers on the front and a 4 piston caliper in the rear then we would recommend our 1.032” bore master cylinder with a 5.5 to 1 pedal ratio.
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