Theres this lip that I was looking at that says that the specs are made to fit 96-99 models. do the 00+ front bumbers differ from the 99-? I have an 01.

 

http://ctny.audiworld.com/mark/a4/diff/

maybe this will help? not sure

 

the front bumper should be the same from 96-01

the only difference i can really think of would be the headlight area because 96-99 are two piece. but thats the only thing that could be slightly different, you should be fine on a front lip.

 

the 01 is a B6 so isnt there some body change?

 

the body change didnt take place till 2002.

the 01 is still a b5. they're the same and the lip will work.