Had the same trouble when I fitted my prodrive calipers to my Foz. Make sure that the rotors are sitting in the middle of the calipers. One of mine wasn't ( just slightly out ) and during cornering without braking the rotor would grind against the caliper ( would be ok if braking and cornering ) Since your calipers are the same ones I'd suggest checking that they've been put back on square / properly

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