Bob,
Isearched their web site but, couldn't find the dimensions for the bolt pattern. Looking at the mufflers that are available, I'm beginning to believe the only thing that will work would be a 90 deg. flex. It might be loud but, Ithink I can quiet it down with a snuffler or one of TBM's silencers. I'll keep searching.
Everything is installed and she's ready for an engine run. I hope to get to that tomorrow after I run the errands my wife wants me to do (never ending it seems.

) I'm hoping the LHSis open has an exhaust diverter that will fit by 7/8" pipe.
Thanks for the link.
Merry Christmas and happy new year.
RJ