Q4 Hex Slip-On Muffler. With the Q4 you don't need to hear the power, just feel the power! KTM SX-F 250 2019-2022. KTM SX-F 250 Factory Edition 2022-2022. Gas Gas EX 350 F 2021-2023. KTM SX-F 250 Prado 2020-2020.
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