First, make sure the rotors turn freely before you install the caliper, Also check to be sure the pistons are fully compressed into the caliper. You'll need big c-clamp to push them in if they're not. The brand of pads doesn't matter. When you buy new pads, there isn't an option to choose what brand of caliper you have. They're all the same thickness. It's possible those are returns that somebody mounted and the pistons got moved or they were not fully compressed from the factory. If that's not it you must have some wrong parts.