The D from the engine code means dual overhead camshaft (DOHC). That is attained by fitting an RB25DE or RB26DETT cylinder head and or turbo to a typical RB30E/T block. The RB25DET will not be typically used.It’s not uncommon for GT-R lovers to sidetrack and discuss Z-tunes and 400Rs. Followers in the model are entirely informed of those confined