Please excuse me if this sounds loopy, which it might as i'm still wired on pain med's from a knee op today.
With the 8 exhaust port mi16 head, do most people just make a extractor to cover both ports per chamber or do they make them individual ports that merge later?
If it's 4 covering all 8 do they make it like a standard port where the two valve seat opening blend into a single port?
If not wouldn't that effect the performance of the flow into the exhaust manifold?
again sorry if it doesn't make sense - i feel like i'm floating at the moment.