Someone asked me to list the upgrades in this post if you wanted more horsepower.
These upgrades apply to 6,000+ feet riding if you want to go to more boost.
To go to 12 lbs of boost you'd need a GT2854R turbo ($1,000) and I'd recommend the Ignition Module ($330).
To go over 12 lbs of boost you would need our modified 2860RS turbo ($1200), fuel pump & regulator upgrade ($400), and injectors ($330).