I was concerned that the inside part may fall into the muffler and work its way down the pipe. There must be an inner wall to the muffler that the rivet bites into, I was wondering how far away it is. Doubtful anyone would know I guess, but a longer rivet may be needed to reach. I guess I'll find out when I drill. Yeah snow riding is dumb, I just went very slow at idle speed in 1st gear for the most part, putting around. The streets are almost dry now that the sun has been shining, so I put 10 miles on doing that today.