New Exhaust System

[aerospace100]

Considering buying an exhaust system for RS6 C7 2017 and have a few questions:

1) Is it true that an Akrapovic system will not void the Audi warranty?
2) I have been quoted £7400 for supply and fitment of the Akrapovic cat back system, anyone had cheaper?
3) Will a Milltek exhaust system void a warranty?
4) If Akrapovic system does not void warranty, does Audi have to fit it?

Thanks in advance.

 

[RS4B5]

If the akrapovic is from the main stealers ie the Audi sport range it will not because it's made as a oem plus option but not worth it look at mrjww video