Indeed, the last picture definitely is a testastretta head (Narrow valve angle I believe is what it means) although comparing those two pictures is pretty cool, our modern ducs have indeed come a long way.
so I wonder whats the deal with getting a 2V vs. 4V design on the helmet???
Not that I could afford a $600 helmet (I go through a lot of helmets lol) but I'd be interested to know if there is a choice between the two?
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