exhaust adapter

Hi, XS-friends! I got a set of stainless steel 1,75 " headpipes for my next project. I heard that a set of torque inserts can increase the torque at low revs a lot. I am looking for a drawing with the dimensions of those inserts. Can anyone help me? Thanks, Hein

My old mufflers had been beat on with a hammer judging by the dents on the ends of each one. After looking at them and trying to cut the reverse parts off the ends, the guts just came out of one. I started looking at mufflers. Money is a little tight for the bike project right now and after...