Still, it might represent a way to save a few dollars on a Hindle system after purchasing your choice of muffler directly from Hindle.…if that's even possible.
Personally, I'd be a little shy of that approach as I once purchased a full system from Hindle and they had mistakingly built the headpipes incorrectly. The company stood behind the product in the end but it was a lengthy process for me to discover the issue and for them to fix it. As always, buyer beware.