I bought a 2001 Audi A6 2.8 in 2011 and I am currently working on modifying it.
Modifications so far:
-Spectre Cold Air Intake
-Two Aluminum Oil Catch Cans

Proposed Modifications
-Shadow Body Kit
-JSP Apache Touring Wing
-Subaru Style Reverse Hood Scoop
-PES G2 Supercharger
-Drilled Rotors
-High Flow Exhaust