Cutaway model of a 4-valve per cylinder engine head, based on a dual overhead camshaft (DOHC) configuration. The model includes visible intake and exhaust ports, valve springs, injector, hydraulic tappets, rocker arms, camshaft, and detailed oil and cooling channels. Built using OEM-based parts, this mobile, compact educational trainer presents a clear internal view of working components, making it ideal for visualizing the function of valve trains in modern internal combustion engines.