I think your right Chuck. I guess there was some confusion over the phone when I ordered it after I had talked to Mark, because I did go back and forth a bit as we talked about the pros and cons of each.

I guess my 40% will be happy to hear I have the HP pipe. I would swap you pipes but I might as well hang on to what I have here and see how my motor likes it before I go jumping around with things.

It might be that earlier pipe was discovered to have not enough volume and perhaps thats why your struggling with yours. Lets hear how your Irwine turns out on your combo, maybe you will have an easier time with it.