I have an 01 wr 426 street legal that I use only to rip around town on, the plug in the exhaust keeps breaking right at the weld that holds the nut on. You can not bye this part alone! It comes with the muffler for about 500 bucks. I had the first one warrantied so now I have two mufflers and two broken plugs. The bike is way too loud without it especialy when riding on the back tire!! Is there anything quiet out there?