When I went to my dealership 4 days ago, I asked one of the advisers if it would be Ok if i put a Remus Muffler on my car... He said it would be ok if it was a bolt on muffler... He said if there is any cutting or welding involved, the warranty could be voided... He said it could only be a muffler, not the cat - back.... What are the chances of me getting what he said in writing by the dealership? Could it happen...?