All I can say is the USDM N/A S4 have the EGR mount on the centre iron



USDM TII S4 has it on the side of the LIM, so the USDM TII S4 has no mount on the centre iron



JDM TII S5 has neither...

 

Well what are the chances of it losing power? could it possibly kill low end torque? Would the s5 N/A manifold neglect the extra flow through the primaries with the TII center Iron?



I'm always hearing that the N/A manifold is a big factor in limiting airflow through the engine, and therefore power. I'm not that familiar with all the valves in it and I am wondering if it is restrictive enough for the center ports to neglect the extra flow from the TII ports. well, I guess that brings up any easy question.

Are the TII and N/A S5 manifolds the same?