[i82much]

I see a lot of posts from guys running aluminum D-port heads. I get the reasoning behind this if a guy already has iron D ports and wants to use his existing headers with a nice upgrade to aluminum heads.

Here is my question - if you don't have D port headers already and they make a round port header for your chassis ... why not just go with aftermarket round port heads? Other than header availability, do aftermarket D port heads have any advantage at all over aftermarket round port heads?