One of the biggest issues with the Greddy intake manifold kit or others like it is that the IACV flange is suited for the Series 1 or 2 RB25DET. If you have a R34 or WNC34 with a RB25DET NEO Engine then you have a completely different Idle Air Control Valve (IACV) & if you wanted to use these forward facing plenums you would heave to buy the old series 1 or 2 one & re-wire that in.
The feedback we are getting from customers about our new intake manifolds we have brought to the market here in Australia is amazing! We are all about genuine brands & high quality parts but we found that there was a serious lacking in a fairly priced forward facing intake manifold for most of the import model cars. This is a made to order product. ETA is within 6 weeks after payment has cleared.