I bought her back in oct of 2016. She came with an axle back exhaust but that's about it. I don't know if I should put in a cold air in take or which one. Anyone have any good suggestions?

 

I would go for Stillen Gen 3 for a full cold air intake application. I love mine

 

Do you have good performance summer tires? If not, that would be my suggestion.

 

Well, what is your budget? Are you aiming for upgraded looks or performances enhancements or both?

Everything I read about CAI is that it's not really that beneficial and some even argue that its a waste of money. For that reason, CAI is not one of my mod plans. If I were you, I start with tires (as Blnewt has suggested) and then do suspension upgrades down the road.

In my case and experiences, I did the tires (Michelin Pilot Super Sport) and noticed my car handle a lot better than stock 19in tires. Then I recently switched my stock front and rear sport sway bars for Hotchkis and noticed an even greater improvement in how the car handles. At the end of June, I will have coilover (Fortune Auto 500) installed and then corner balanced. This should improve the handling even more significantly.

The above mentioned is the route I took and will take. It all depends on your available budget and make sure you have enough cash to maintain your G or fix any damaged components as well.

One last thing, if you don't know the maintenance history of your G, spend money and get everything that needs to be done first before modding it.

 

I always like to do intake and exhaust on most cars I own. With the G37 they really don't do much on their own. A tune helps alot but even then you may see about 25-30 HP from all 3 mods. Do not believe the hype all manufacturers use to promote their products. They are all lies. If you want to mod, do it because you like to tinker with your car and want a different sound. Only real way to get performance out of this car is supercharger or turbo and go on a diet.

 

Lighten car, take driving lessons, then add parts