If you mean the two pipes welded into one inlet with the four bolt flange for test pipe on one end, i have one. You must have had a single / muffler exhaust set up, huh ? Make me an offer and I;ll package and ship . Garuy L. Detroit area
I have a test pipe for a stock exhaust, you could have someone cut the flange off it and weld a section of 3" pipe to it, and then have the other side expanded to fit over the 3" you have.