Ok fellas I have a 2006 Audi A6 4.2 Quattro S line that is currently straight piped. Now money isn't too big of an issue I just want to know what should be my next move in making my baby faster, aside from cold air intake? Also I'm caught up on my maintenance. I was thinking turbo but I figured I should do as many mods to the engine as possible before adding a turbo.