xrs only slip on is a 3/32 materail thinkness stainless steel reverse megaphone that appears on the outside not to reduce down at the silencer The xrs only slip-on is heavy duty built like the bike with no WIEGHT SAVINGS however can easily be re-welded if damaged in a crash theres 8 inches of sound suppressant packing on inside core and you can run it with no end cap without the risk of packing blowing out