As for wheels im clueless on the measurements and what it takes to fit certain wheels on certain cars etc. Im looking at some wheels and the measurements are 18x7.5" ET 51. They are the wheels for a vwmkv/audi a3s/eos. Will they work on a 99 a4 quattro ? here is the link. http://shop.achtuning.com/index.asp?...mp;ProdID=1104let me know what you guys think.