2BN_S13 wrote:Buuuuut... in order to get the ful air from the UK design you need the intermiediary plenum piece. How should I describe it? The piece of the intake manifold that (for the JDM monifold)splits the air into 8 ports instead of the european piece that has a straight run. You have to admit is goin to be better flow with that consistancy.
fraz wrote:All you need to run the 4 port head in an existing 8 port installation is the bare head, lower half of the inlet manifold, and the fuel rail.
ragenasian wrote:
I was under the impression that the upper intake manifold was designed a little different also, or at least somebody mentioned that the injectors sat different.
The top half is identical. The difference is the fuel rail mounts to the lower half instead of the bottom of the top half so you need the fuel rail to go with the head and lower half manifold