just to explain these sorry as numbers, the VQ engine is very sensitive to heat.. alot of morons go with the cold air intake setups which actually lose power.. the infamous Injen/aem/and yes.. the nismo too, how can inflow be good with that kind of piping?.. its just too damn long, and all the upper intake tubing on all those and most other intakes conduct heat so well.. totally killing the point of them being "cold air", the best intake set ups for this car are with either a inside out super jet hot coated piping or with the OEM tube.