Just picked up a 99 a6 2.8l quattro wagon, anything I should do fun or maintenance?

[Mikerodub]

Hi all, new to the forums also new to audi more specifically my 99 a6 wagon.. car phone and all lol.

I was looking into doing a few things and would like to ask for some guidance.
I'd like to do the exhaust probably Remus but I don't know what size I should use for the pipe, a tune either for power or fuel economy or both if possible, and the intake. The other thing I was looking into was putting in a touch screen deck for nav and dvds but every time I look up how-to's it's never my model.

One more question.
The wheels I have on the car are thick 5 spoke wheels similar to the ones on the older chevy cobalt SS models, are they from a different year?

Thanks for looking
Mike

 

[Samuel c5 Q]

No harm to you but they are too thirsty for being too slow. I wouldn't touch a thing on it and drive it as a stand in car in the winter in case a bashed my good car off something.