91 Galant VR4

[Pushit2.0]

This is a fully divided exhaust manifold, and the exhaust housing is divided threw the scroll also. So the #1 and #4 exhaust runners go to one side of the scroll and the #2 and #3 exhaust runners go to the other side of the scroll. I do not plan to waist a lot of exhaust gasses so the dual gates is only to keep the manifold divided sense the runner length is equal for the #1 and #4 then #2 and #3 are equal length but they are a little longer then the #1 and #4 runners. I am not to worried they are so close to the head, but if its an issue I will move them.
For drag racing you could not use a exhaust waist gate at all and run a charge pipe by pass valve to control boost, this is what Brent Rau does but he runs 86psi.

~John