Quoting Turboman_456:
Is that what that plate does that Strictly Performance sales with their kit, shims the rotor?
Yes, it moves the rotor out a few MM. I have heard/read anything from 2-5mm. I'm still pricing together parts to do this conversion. Right now I need 13" svt rotors to see what kind of a shim I need. The plate they sell is also a hubcentric ring to make sure the rotor sits centered because the svt rotor center bore is 2mm bigger.