Smyth truck conversion kit for the 2003 to 2008 Audi b6 and b7 platform A4 and S4 cars. Note: Acura mdx tail lights need to be sourced by the builder. Used ones have the factory led array. New shells are available but do not include the internal wiring and led bulbs.
 
Note that 02 was the transition year, make sure the tail lights amtch any 03-05 car and you are good to go,
 
Later b7 cars require b6 style door blades on front doors and a fuel door from a b6.