The D in the engine code stands for dual overhead camshaft (DOHC). That is accomplished by fitting an RB25DE or RB26DETT cylinder head and or turbo to an ordinary RB30E/T block. The RB25DET will not be commonly used.Although it’s not as discussed as a few of its cousins, Nissan’s RB25DET was even now the most effective tuner engines with the 19