The 05 G35 brakes are bigger like the 06 350z brakes. They are 320mm and the Brembos are 324mm.

The stock rims on a G35 coupe with Brembos are 30mm 18x8. Per the Offset Calc, it says these will go in 2mm on the front compared to the stock ones, and go out 11mm in the rear because of width of course. The 05 G35 stock brakes are just as big pretty much as the brembos and these have more than enough clearance for the caliper as well.