These conversations always make me smile...when we say "void exhaust warranty", what exactly do we mean? So if a bracket rusts and breaks, are we really saying Audi wouldn't cover that? In a court of law, I'd love to see their defence.
I'm probably wrong, but to me it would be down to Audi to prove that your mod has been responsible for whatever problem has occurred before flatly rejecting a warranty claim.
Hmm, they will always try and wriggle our of paying, mods just give them more excuses really