I saw this online and modelled it when I had some free time. It has an engine block, oil pan, intake manifold, crankshaft, front cover, two air filters, air turbos, crankshaft bushings, ehxaust manifolds, cylinder heads,  camshafts, hoses, and valve covers, three belt wheels, six pistons, eight camshaft bushings and camshaft retainers, twelve rocker valves, rocker springs, and rocker arms.