I need your help guys. I am having the hardest time finding a perfromance exhaust system and cold air intake system for my 2004 A8L 4.2...

Can anyone help please???

The only exhaust that I know of is from MTM, and absurdly expensive. Mind you, this would be all about sound and not much else. As to intake, your car already came with a cold air intake from the factory, so exactly what do you think you're going to improve on, other than letting more hot air and dirt into your motor?