FMF Powercore 4 Hex Muffler KTM Husqvarna 045589 Alpinestars 2024 2003 KFX 400 300 RR 2003 KFX 400 This is TMD’s lowest drag and longest lasting MX Off road kit Make Model Year HUSQVARNA FC250 16 18 HUSQVARNA FC350 16 18 HUSQVARNA FC450 16 18 HUSQVARNA FE250 17 19 HUSQVARNA FE350 17 19 HUSQVARNA FE450 17 19 HUSQVARNA FE501 17 19 HUSQVARNA FX350 17 18 HUSQVARNA FX450 17 18 KTM 250 EXC F 17 19 KTM 250 SX F 16 18 KTM 250 SX F FACTORY EDITION 15 17 KTM 250 XC F 16 18 KTM 350 EXC F 17 19 KTM 350 SX F 16 18 KTM 350 XC F 16 18 KTM 450 EXC F 18 19 KTM 450 EXC F SIX DAYS 17 19 KTM 450 SX F 16 18 KTM 450 SX F FACTORY EDITION 15 17 KTM 450 XC F 16 18 KTM 500 EXC F 17 19 The end result is a quality muffler with improved torque