Have you fitted the exhaust yet? You'll be well pleased, it sounds great and looks great.
I didn't ask about the warranty. My bike has a few thousand miles on it now so hopefully nothing major wrong with the engine. I believe any mods are only relevant if they can be proved to have a caused a defect you're trying to make a warranty claim against. So yes, if your valves burn out, you have no chance of getting this repaired on warranty as the new exhaust might have made the bike run lean. But, if your rear brake light stops working or you radiator leaks, should be pretty hard to claim this was caused by a different exhaust, so should be ok.