All this talk about preserving warranties!!! I've had lots of fun with warranties with dealers. If you can, go to Performance.....even if you have to drive for a day to get there. My dealer will not even honor my tire feathering problems with the NISMO S-Tune suspension. I think it all depends on the dealership what they decide to cover and not. But then again, I received a letter from NNA that my S-Tune would not be covered under warranty. I really don't know at this point so I am going to have my engine rebuilt, and then install TT so NO warranties will apply!