Good news for those own Turbo S with 420mm pccb looking for converting to iron, we have since tooled up a casting (Mold# D604) with 420x38x88mm which was made for those cars with 420x40mm CCB such as Audi RS7, Bentley Continental, and Porsche Panamera Turbo S.
Disc wt is estimated @30 lbs, with light weight aluminum hat and hardware the assembly weight is to be about 33 lbs.
Complete front and rear rotor kit can be ordered here with a 6-8 wks leadtime.
Whether you are looking for rotor replacement, upgrade, or conversion, RB is the place for all your braking needs.
COMPLETE Brake offer for Panamera: