And to add to the three options of ACM, MS and Turner, you can buy an entire x-pipe for $449 from TopSpeed:
Cut it however you want. You get 500% more stainless steel than the competitors sell. Been running mind since early this year. Added some resonators to keep the wife happy. People love the sound. You could sell the rest of it to someone who wants a Sosi x-pipe (which is essentially the rest of it).