Are you talking Cadillac multi piston brembo calipers? Be very careful running a multi piston style caliper on the rears without a full floater diff. As the flanged axle moves under hard cornering it knocks the pads back into the caliper and then when you push the pedal your first couple of inches of travel there are no brakes, not even fronts as all that fluid is just moving the pads back towards the rotor. I am going through this issue at the moment. Just something to think about!!!!
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