I've done some research on this turbo upgrade. It seems as if it's compatible with my 2005 A4 2.0T without any other upgrades. I have a Forge diverter valve kit to install as well. I'm looking for the best bang form my buck which is why this caught my attention. But I do not want to take the cheap route and mess anything up on my ride. I would appreciate any knowledge in this area. THANKS!