I'm looking for an aftermarket muffler for my bike under $300. Basically the only one I can find the FMF Powercore 4 Hex. Can any of you recommend another one? or explain why the mufflers are so limited for this bike? or explain what's different about the Hex than the regular one? I emailed FMF but wanted to see if any of you are faster than them. I've also looked for skid plates for this bike and that is very limited too.