Originally Posted by jchammond

Take a look at Z1 Motorsport's 400hp kit (flywheel hp) if you're gonna stay N/A...otherwise look at the boosted kit's available.
Twin Turbo easily puts down 600rwhp & a single supercharger w/air cooler 500rwhp....it's all about the ($) & where you are looking to go.
without boost or nitrous; peak is around 340ish rwhp.
Also,,,Mods are like drugs....very addicting!
have a good day

Originally Posted by jabo5779

I started doing na mods around the same time as you on a 2014 base. Now the stillen cai and fast intention long tube headers are coming off at 17k miles, along with other worthless stuff like upgrades base brake rotors and pads - going sport package now.

All my na mods will be on the for sale forum soon. If you want them hit me up. My advice though, dont waste money on anything NA only if you are going FI. These mods, while fun as heck, only delayed my next step. The sooner you pick a direction and bolt toward it the better off your wallet will be in the end.

Regardless my best mod so far is the RJM clutch assembly. Hands down, changed the car for me. That is one of those mods every should just do.

Originally Posted by solidus

If you plan to stay NA my experience in a G37 was , FI resonated HFC, Motordyne XYZ with exhaust, Takeda long tubes ( or Gen 3) PST carbon driveshaft ( not necessary on a Z) Uprev w/ tuner cable and Motordyne intake manifold. The mod I felt the most from that should have been the first was changing the rear diff to a 3.69 from a 6mt into my 7at which was originally 3.36. The issue is where you plan to go. If you plan on boosting later skip everything and just get your money set for boost. Otherwise stay rational in your expectations because for the money spent it can be crushing when you find that you spent 2/3 boost money and made 1/4 the gain.