For your reference, OE front=350x25, rear=302x11mm
All our front OE replacement rotors are made to 28mm (3mm thicker than OE 25mm) for extra thermal capacity. This stock replacement disc is the same as Porsche 997 TT rear stock @350x28.
19" wheel BBK rotors are completely swap-able between iron and CCM rotors.
RB brake kits' calipers, pads and rotor hats between 18" and 19" iron kits are interchangeable. For example if later you want to upgrade to 380mm brake kit from 355mm, you just need to replace the rotor discs and add spacers (washers), all other components remain the same.