1964 Valiant "Get Runnin & Drivin"

Once again it's time to parade my ignorance. First of all, do you know who made them? And, I don't see the usual triangle ring that lets you bolt the header to the downpipe. How do these connect to the rest of the exhaust?
Yeah they're Clifford headers. The standard collectors have been replaced with V band clamps. I have those as well.