Nissan produced the N1 block a bit distinct when compared to the conventional RB26 block, and is also marked which has a 24U in place of 05U to differentiate it.The RB engine spouse and children contains one overhead camshaft (SOHC) and double overhead camshaft (DOHC) engines.[four] Each SOHC and DOHC variations have an aluminium head. The SOHC var