My head is not divided.
The other main reason for the divider was in hopes to create better fuel distribution,so the air fuel mixture does not stay on the outer part of the intake. To possibly feed #'s 2 & 5 cylinders better.

The velosity I would say did not increase,if any,,but I believe I got a little better fuel distribution.

I installed my upper port lumps & that did increase the intake port velosity.

MBHD


12 port SDS EFI