yep sure were! That was in response to someone speaking about long tubes versus shorties. My response about the H's not interchanging was about long tubes. Like I said, everyone knows or should, that any shortie H or X or PC will work with any set of shorties. The only ones I've ever heard any issues on was the Bassani's I believe, and they will work, but not as well as when the bassani headers and off road pipe are combined. I used Bassani 1 3/4 shorties on my 600 hp vert, but I had the X pipe custom made to work with them.