Warranty info to end it all

OK this is straight from a technitian/rep from mazda of Marin. He told me that they may only void a warranty on something if they can prove beyond a shadow of a doubt that the part you installed was responsible for the failure of what you bring the car in for. He said and I quote, "it is usually more expensive to prove that themodification the person made to the car caused the failure than to simple fix it." Don't let this go to your head. If you take out your NOS after you blew your motor or tranny and took it in to have it fixed they will not hesitate to prove you're the guilty party and of course the scratched on the bolts and melted pistons will be a dead givaway. This just pertains to things like exhausts and suspension lowering; stuff of that nature. Hope this helps a little