I've been searching and searching for this and haven't found any results yet.

Keep in mind, i already have; Takeda Short ram intake, Kinetic HFC, Megan Racing Y-Pipe, Straight pipe from Y-Pipe back.

Z1 Motorsports makes a G37, GTR Conversion kit. I know its pricey and i know how much it'll cost all said and done. My main question is it good for NA use? does it produce anymore power when used in a "NA" car.

Is it good for boost? If yes than can GTR down-pipes, Intercooler piping, etc. be bolted directly to it? In the long run for boost applications this will be cheaper to find "used" GTR parts than Buying, say AAM Twin Turbo Kit parts.

Obviously another obstacle with this is that you have to buy the intake manifold, that is no problem either.
OR
Would it be easier to buy Z1 Motorsports G37 Plenum, and Upper intake manifold and call it a day? If this is easier Im just going to build internals, first, and save up for TT Setup.

 

it definitely will help na cars but that conversion is mainly for twin turbo cars. it's not worth the money for na cars. Just port the stock one its cheaper and probably just as good for na.