Is there any type of adapter that I can get to use my a downpipe made for an HX35 onto an HX40? It would be great if someone sold an adapter or something? What would be involved to fab something up? Does that airflowsystems place have what Im looking for?

 

Check out Pier's, I think they have what you are looking for, Darl Absher III

 

The Piers adapter is to use an HX40 downpipe with an HX35.

There is no adapter to use the 35 downpipe with an HX40. You could buy the flange and cut and weld it into place on your existing downpipe but you would need a bit more pipe and you would also have to add another bend. I think you are better off sourcing an HX40 downpipe.