I'm fairly new to the Audi world. Purchased a 2006 A6 4.2 s-line lease return in Jan 09. If i knew then what I know now I would have looked for a 2007 4.2 FSI as they get 15 more pony's and better mileage. Any suggestions to increase HP and mileage would be welcome.

 

chip and exhaust get you something, not much.
supercharger. period.