exhaust port shape question?

[sharp67]

I have a set of the new afr 195 heads and the exhaust port shape is 1.538" wide by 1.440" tall and 1.665 corner to corner. my question is, does the primary tube on the header need to start off square or can it be round as long as it clears the exhaust port on the head?

[Joe_Rocket]

Yeah, I'd like to see an answer to this. I recently got the same heads and was wondering about which headers to mate them with...