The RB26 has a Solid iron block by having an aluminum alloy head. The valve train can be a DOHC with twin-cams and 4 valves for every cylinder for a total of 24 valves on the engine. The RB26 does not have variable valve timing (VVT), which Nissan wouldn’t introduce of their engines until finally the early-‘90s.Sure I been given my JDM Nissan S