Re: K04 Upgrade... (Levish)
You will need the turbo, a set of crushwashers(oil cooland lines), studs/nuts for the dp and gaskets about $50.(do a search for part numbers)Extra pink coolant. Some guys take off the exhaust manifold. Do yourself a favor and replace the nuts and gasket ($60), unless you want to go back and tighten up a loosening manifold.(VW recommends this, nuts are one time use). The other way is to take the turbo off only.
The chip is the key for unleashing K04 power, the GIAC works extremely well, APR seems to work ok but is not specific. The UP is still under development.
But one thing you have to remember when modding, be prepared to trouble shoot, find a good reliable VW specialty shop to help you out. Sometimes dealers will deny to work on modded cars