Hook up a 150 shot, pray you can make one pass, then retire the vehicle. Nitrous is the best bang for your buck over any power adders. But to be honest $12k when it's all said and done will get you a supercharger with supporting mods. $15k-$20k will get you a decent twin turbo kit (dyno, tuning, etc) with supporting mods. $25k+ is all frivolous. At that point just trade in your 370z for a c6z06 and mod that.
