I am pretty new to Audi, I have B6, had mine for about 3 months and I don't have HID's because I wanted to get aftermarkets in the headlgihts and fogs to match but I have changed my mind cuz I can't find 4300K H11 HIDs...anyway I want Ecodes but I need to know if any modifications need to be made to the B6 to install and where is the best/cheapest place to buy them?