I hope you have you engine completely rebuilt to handle that size of turbo! If you do not then the first time you get on it, you will blow your engine and be SOL! It does not matter if you have the best tuning equipment and tuner. No tune will protect a lame motor. You also do not have the right supported mods to support this kind of turbo.
You will need to have forged cylinder sleeves, rods, pistons, new studs, bearings, and rings. These are for the motor, so it does not blow. Next, new turbo manifold w/ external wastegate flange, new or rebuilt fuel pump(2nd fuel pump for injectors), maybe new injectors(debate on this), 3" inlet, fmic, and a good custom tune(AP does not have that ability yet).
You are looking at a lot of modifications and around $12,000-$16,000 depending on which company you go with. You are going to need a lot of time and money, but the outcome will be over 400whp and 350wtq!
You have to ask yourself: what is my goal, what is my price range, can afford the down time of my car?
I am trying to give you the most information you need so you do not waste your time, money, or your motor.
If you are looking for a settle upgrade for the turbo that is safe w/ stock internals and does not require much support from other mods. Then, you should look protegegarage.com, they can rebuild your stock ko4 to flow 30% more than the stock turbo and spool faster than stock.
