Where are the answers to your question?
Step 1. The 1000AAQ's.
1000 Already Answered Questions is a good place to start.
Step 2, FAQ's.
The one we have is located right in this thread. Look down.
DSMtuners has one
here.
2gNT
Step 3, Search the Forums.
DSM tuners
Racing Knowledge Online
NABR extreme tech
Before asking about a turbo, tell us what the specifics are. What mods do you have? How much power do you want? Street/track? FWD/AWD, year?