Installed the Delkevic Stubby 14" Carbon Fiber Oval Muffler to fit XT250 https://delkevic.com/stubby-14-carbon-fiber-oval-muffler-to-fit-xt250-2008-2019/ and absolutely love its look and sound! We chose the oval cross section. The note of this is very deep and actually soothing to hear. I don't know about any improvement in performance, but the sound and look is incredible IMO. Oh, and no it does not melt the light or plat e holder like the FMC does.