Im pretty sure I know the answer here, but just incase ive missed something glaringly obvious, ill ask...

If you have a manifold that is proper basic and poo, a log manifold basically, seemingly made for cheapness and to fit in a space, nothing to do with equal airflow, just 4 runners going into a flat log shaped collector that exits to the downpipe at one end.

At the moment the flow will increase 4-3-2-1.

If i got the exit at one end welded up and a new one placed slap bang in the middle, that wont have any bad effects will it?
I mean by looks of it it will have an improvment in flow overall.

Looks to me that 3+2 will have equally the most airflow, as much as 4 did on the old setup, and 4+1 will have equal airflow too, and about as much as 3 did in the old setup.

Am i missing anything? Pretty sure im not...