I dig this car.
 

Ok I bought a 2001 Audi A6 2.7L BiTurbo Quattro. I freaking love the car. But I want to make it a beast. I have never owned an Audi or a car like this one. (Mostly junkers) so Im hoping that someone can help. I'm wanting to increase it to around 600/HP and make it purr not fart. So a list of Upgrades/Prices and such would be freaking sweet! Thanks in advance!