PRO CIRCUIT 304 Factory Sound SilencerKTM SX125 04-10KTM SX144 07-08KTM SX150 09-10KTM EXC125 04-10- Feature a longer midsection and more noticeable over-rev- Excellent replacement for the OEM silencer while offering impressive performance gains- 6061 T-6 brushed aluminum housing- 304 stainless steel intake tube- Double-walled mounting brackets- FIM-approved 304 stainless steel end cap- Steel Allen head screws for re-building/repacking- Exclusive E-glass pillow packing