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Just out of curiosity, where did you get those two 'ball and cup' exhaust couplers?


Found them online:
http://www.mfgsupply.com/m/c/02-769.html

Those are the 2". The 1.75" ones have a picture so I had a good idea what the 2" looked like as well.
http://www.mfgsupply.com/m/c/02-768.html

--Dan