They look great & you are right about the cost. I see like new sets on eBay for $45.
Did they fit right over the Kawa exhaust? Looks like they are straight back, no kink up like the stock exhaust.
Great idea?
Save yourself some shipping. Take a look on Craigslist first.
My Harley muffler inlets were larger in size (1.750"OD) vs C10 exhaust pipe 1.720"ID??). If memory serves me correctly, HD was about .030" larger. I hand expanded the HD inlet to be about .060" larger than the C10. I then used some exhaust gasket material (ordered from O'Reilly's), cut into a short strip (approximately 1 1/4 x 5 1/2") and carefully placed it inside the muffler. It was a very snug fit to start, but I then tapped the muffler onto the pipe to gain a 1 1/4- 1 1/2" overlap. This process of deciding what to do and getting the initial fit was the toughest part of the whole job. Once the muffler is on, you can wiggle it around on the pipe to "unsnug" the connection.
On final install, after I figured out how I was going to "hang" the muffler, I smeared a little exhaust gasket sealer to tightly seal the fitted area. I bought a pair of stainless steel t-bolt exhaust clamps on eBay for $6.00 to secure the connection. You might be able to find some t-bolt clamps locally, but make sure you can find the widest possible and will have a tightening range to clamp over a 1 3/4- 2" pipe. Of course, how to hang the muffler depends on the model of muffler you choose. I do have some exhaust gasket material left over. PM me and I will send you enough to do your installation. Or, you can look up on O'Reilly's website and get your own supply. There are two thicknesses. Get a sheet of the thinnest material available. I can get their part number if you like.