The RB26 incorporates a Forged iron block using an aluminum alloy head. The valve educate can be a DOHC with twin-cams and 4 valves per cylinder for a complete of 24 valves to the engine. The RB26 doesn't have variable valve timing (VVT), which Nissan wouldn’t introduce within their engines till the early-‘90s.The oil pooling along with the hea