The RB26 includes a Solid iron block by having an aluminum alloy head. The valve coach is a DOHC with twin-cams and 4 valves per cylinder for a complete of 24 valves over the engine. The RB26 doesn't have variable valve timing (VVT), which Nissan wouldn’t introduce of their engines until the early-‘90s.In this post, I would like to debate a few