First of all, dude the pipes must be included in the warranty. Second of all, in case you get to use any kind of boost, any kind of tune ups, the warranty runs out. In stock they run for at least 100k km. Which is not bad at all actually. And even if you decide that it is a problem from the factory, you must turn to a certain ''great'' court, not to the local judge, you know that? However i do not consider this a great reason to get to the court. As an example, i can tell you a case of a friend of mine. He filled a suit of
libel California, against a BMW dealership manager. It was at the local court, the guy lost it and had to pay the manager a pretty insame sum of money. You just don't go against these kind of companies.