I have a custom made 2.5" FMIC kit with piping + dual intake piping which is also 2.5" that goes out to the oem locations of the smic's. The kit has about 14k miles on it and has seen only 19lbs of boost max with no issues at all. This kit was specially made for the z with cooling efficiency and pressure drop issues in mind. The way it is angled makes sure there is lots of air going to the radiator. I had no heating problems what so ever. As far as pressure drop goes there is no issue because this is basically 2 smic's put together to run in the fmic location. The kit was made by boost logic. Piping is PC Black. $1000 + S&H