I'm looking into chipping the ECU with a GIAC chip on my 2001 Audi TT Quattro 225HP. I was wondering what I should upgrade to properly do this. Can anyone help please? I know I need to upgrade the turbo hoses and the coolant temp. sensor to the green one. What else should I do? Exhaust? Intake? DV?

 

Per the Search feature, DV has to be upgraded or you'll have unstable boost - the stock diaphragm can't hold the elevated pressure. The other stuff isn't necessary but will help the car breathe better.