If you have the cable for the e-manage, and the software...you can tune it yourself. You also need either a WBO2 meter/logger, or a Canscan that can read the WBO2 off the car.
The rest is logging and altering the map until it runs the way you want.
If your like me...it becomes a game....and you spend a lor of time trying to get "the perfect map"....kinds like when your 20...lookin for the perfect woman :D
Getting old means you realize neither exist....:D :D