I'm looking into getting as many bolt ons as I can and was looking for some advice. If you could post your personal mods / how you'd rate them / and where you bought them from it would be greatly appreciated.

I know the s4 has the 2.7t but is the engine bay different on the two cars?

Audi Vince,

Please look before you leap! The info on this question has (in my humble opinion) be discussed at length in the following thread.

https://www.audiforums.com/forum/audi-a6-9/tips-suggestions-new-2-7t-owner-55914/

Read this first, then ask specific questions, you will have better luck.