Hi all,
i have 2004 A8 6-Cyl 3.0 , and i want to add more power to it, please advise me of what to do. I need just little more power or at least 50% more power

, in other words i want either an easy quick way to increase the power a little or any other ways that add at least 30-50% power.
if i use K&N air filter will that add any power.
thanks