makes sense. simply widening the ports makes little sense considering that velocity decreases as the square of diameter, and the pressure drop is the fourth power of the radius. This is a system you must optimize, you don't just make it bigger to make it better.
And of course, the obvious point: The intake and exhaust ports are exactly the same diameter as the gasket as well as the inlet and exhaust manifolds.
And the more depressing reality: This isn't a racing engine