Happened to me when I called them to by a set of CMI headers two years ago. I told them I wanted the CMI water jacketed diverters to work with the Merc Y tube. They told me it wouldnt work and they wouldnt even give me a price. All they wanted to do was sell me their external switchable mufflers and when I told them I wanted the CMI Sound Choice diverters I was as good as DEAD to them.
I bought the headers and diverters from someone else.
Seems to be a pattern here.