NISMO has 700cc more capacity......and each branch is 25.3mm longer.
When we use factory plenum with high boost, there is issue with air distribution to each cylinders.
From what we found(for long time), No5 , No6 cylinders get more air flow than the other 4 cylinders.
Using good ECU will help this problem, but there is the limit even from ECU tune(especially for track use)!??
So we need to close look at these two plenum, what is the difference between two.(prices is big!! first)
Using NISMO plenum seems to fix the problem so far...........than others.....
NISMO plenum has funnel on each cylinders.....And there is spare hole for extra injectors!??
Not cheap but.
Worth it!!!!!
