The RB26 contains a Forged iron block with the aluminum alloy head. The valve train can be a DOHC with twin-cams and 4 valves per cylinder for a complete of 24 valves on the engine. The RB26 does not have variable valve timing (VVT), which Nissan wouldn’t introduce in their engines right up until the early-‘90s.Soon after R32 components guidanc