Originally Posted by Jet711
this is getting boring!!!!!!!!!!!!!!!!!!
Amen, both great heads, there is no winner we need choice!!
The AFD head fits any 2V manifold so the port opening has to be close to standard.
The CHI head has a modified inlet port, (one of its features) and is designed to be fitted with a CHI inlet manifold.
As xdclevo said the minimum cross section is not measured at the gasket face.The port opening is clearly much smaller on the CHI head but this is not the area in dispute.
I also agree with xdclevo, that the angle of the photo needs to be the same. The photo above shows the port all the way to the valve on the AFD head which makes it look much bigger than the obscured view of the CHI head.
These are both great (Aussie made!!!!!) after market items for our clevelands, no need to divide and conquer.
But well done brenx to get the photo up so quickly. Where did you get it??