has anyone received any email or questions back from this guy? I emailed and got no response. With 0 feedback, my worries are it is just another ebay rip off. I am right in the middle of doing an exhaust job, and adding the Sprint manifold and these look pretty good. I had a 1 5/8 pipe, and want to move up to 2". I have and will have quad tips from anza. Taking it all to a custom shop near me once I get it all gathered together.