I was able to get the clips to run after downloading and installing this codec patch --->
http://www.codec-download.com/modul...wnloaddetails&lid=242&ttitle=G_726_Audiocodec
And they sound good! I was actually surprised there is little difference between the H pipe and X pipe with your mufflers (which I read up on further last night, finding that they are very similiar to good ol' Flows)
Thanks Chris@pypesexhaust - you sold me on 'em. I'll be ordering soon.