Just wanted to share a little mod I did to my Rmax. I added a 1-¾ tail pipe. Machine is not only way quieter but also sounds way meaner, throaty-agressive. I used a 16ga mandrel U bend and then a 18ga straight piece and then welded the original tailpipe elbow back on. Made a hanger for it and also I removed spark arrestor screen (leave this in for maximum sound reduction) and had to remove plastic heat shied. Zero power loss maybe has little more if anything.