I own a 2001 A4 1.8t, Quattro with tiptronic. I realy want to add a K04 or a bigger turbo to the car. But I do not know where to start. I am living in Germany and have found a good shop where to work out of. I am ready to start ordering parts but I only have a grasp on a few things I need but I dont want to miss something and leave it out. Please let me know if any of you have any ideas.

I allready have a APR chip, DV valve and a evom. Cold air intake.

Thank you.