Mine didn't fit right, for the front. I don't remeber too well, but there was this hex fitting thing that was bracketed to the car and the hex was the wrong size. I had to have it machined smaller to fit.
Im happy with my ceramic coated Mac shorties and stainless o/r h-pipe. I thought a catback came with the pipes between the muffler and h-pipe. Maybe by midpipe, you mean h-pipe.
I have straight cut cam gears on my Honda700, and its incredibly loud. But im glad theyre there( redline at 12K) so I never have to change a chain. I think the sound is from the friction from the contact area of the teeth.