Standard terms are any non-original item would be excluded from the warranty (e.g. AP brakes, aftermarket exhaust, etc.), and they would also try to wriggle out on engine/transmission damage if the engine had been modified (including remapping).
Ultimately it depends on how friendly your dealer (for AUC/Mondial warranty) or indy (for A.N. Other warranty) is.[/quote]
Kinda guessed it will be dependent on the stealer. Its a bit of pot luck as they can blame a lot of things on aftermarket exhaust, alloys etc.