So I just did the harley dyna muffler swap but I had a pretty bad air leak at the connection. I did the tin can thing and everything, the only thing I can think of is the clamp I used. Nowhere in my town sold the clamps used in the harley muffler swap tutorial. So I went to auto zone and got a "muffler clamp" which is a u shape and a plate on the bottom. In an attempt to fix the leak  wrapped the connection with some heat wrap/muffler fix tape. The leak isn't bad anymore, but I can feel I tiny bit of air coming out. What should I do?

Glen I feel your pain, I needed one smaller then the second one I had. I went to 5 auto supply stores and two motorcycle dealers and non of them stocked the band type clamps    I even hit a few dollar stores, I think it was Serow that said he came across them at one by chance once.....no dice.  For the time being I cut up a tuna can folded it over twice and used that as a filler for the clamp and it worked till the proper size clamp comes in from being ordered online  

Also,... if the muffler just won't neck down,... cut a few more slots with a hacksaw...  eventually you take away enough metal to allow the clamp to squeeze it down tight...
Reminds me of my favorite Vegas hangout...
"Lots O' Slots"... ...