I am saying when I spoke with Doug Thorley, he had no recommendation for any type of crossover whatsoever. He had dyno proof that they were not effective. He seemed to think all the hype over them was just that hype. Yes, his recommendation was two completely separate pipes. Of course, I am sure the arguement will ensue. lol I find that's probably a pretty honest assessment, because since he is in the exhaust business, I think he would offer some form of X or H and he does not, because his opinion (based on dyno fact) is that they are not worth the money. I find that interesting from someone with a 40 plus year racing history.