The Greddy intake sits up higher, the plenum is more raised up than the low hanging stock SR20 intake. Keep in mind however that the Greddy intake is set up for a different style throttle body than the stock S13 one. I think the S14 throttle body bolts onto it??? Anyway I had to have my Greddy intake chopped down in front cause it comes forward a lot more than the stock intake does. At the same time I had a throttle body plate for the 90mm Q45 throttle body welded to the shortened intake. I've heard these things have a little bit of a flat spot off idle simply because there's soo much more of a volume of air going through them! I'll get pictures up when it comes back in the mail. The Greddy intakes use the stock SR20 style injectors and fuel rail. If you want top feed style injectors you'd have to get a different fuel rail. There really isn't any need for all that, cause stock style injectors can be had in all sizes. My bro is pushing 400 rwhp with a GT40R on his 180SX and not having problems leaning out with 850cc injectors, 255 lph fuel pump, Nismo regulator, and stock fuel rail.