Cylinder Head CAD Animation (SolidWorks)

This is an animation of a cylinder head, modelled on Solidworks 2009.
The cylinder head was modelled to scale based on a Nissans Cylinder head, using various measuring techniques.
The second half of the animation shows a rendering of the model, produced in Keyshot 2.1.
For any of my other CAD work please visit:

[robbedoes]

are the springs a solidworks feature? or have you drawn them? (because they compress)

[brucebaxter]

awesome work.
what cylinder head is this based off?
is it accurate?

i am looking at the possibility of 3d printing a head casting of the old gilken 4 valve head for the l series heads.