BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | OFFROAD EXHAUST EXHAUST 14 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 4-6 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. FITS MODEL DESCRIPTION PART # EMIS* BETA 350/400/450/498/520 RR/RS 10-13 HEX slip-on muffler 1811-2617 4 350/390/430/480 RR 20-21 HEX slip-on muffler 1821-2005 3 GASGAS EX 250/350/450F, MC 250/450F 21-23 HEX slip-on muffler 1821-1918 3 HONDA CRF110F 19-22 Slip-on muffler 1821-1962 3 Spark arrestor muffler 1821-1963 3 CRF125F 19-22 Slip-on muffler 1821-1964 3 Spark arrestor slip-on muffler 1821-1965 3 CRF150F 03-10/12-15 Spark arrestor muffler FMF041048 3 CRF150R 07-16 Spark arrestor slip-on muffler 1821-0540 3 CRF230F 03-17 Spark arrestor muffler FMF041048 3 CRF250F 19-21 Spark arrestor muffler 1821-1966 3 CRF250R 06-09 Spark arrestor single slip-on muffler 1821-0663 3 CRF250R 22-23 Powercore 4 Hex Muffler 1821-2050 3 CRF250X 04-09/12-17 Spark arrestor slip-on muffler 1821-0662 3 XR250R 96-04 Spark arrestor modular muffler FMF041020 3 XR400R 96-04 Spark arrestor modular muffler FMF041021 3 CRF450R 03 Spark arrestor modular muffler FMF041036 3 CRF450R 04 Slip-on muffler 1821-0664 3 CRF450R 05-08 Slip-on muffler 1821-0665 3 CRF450R 21-23 HEX slip-on muffler 1821-2041 3 CRF450X 05-09/12-14 HEX spark arrestor slip-on muffler 1821-1555 3 CRF450X 19-23 HEX slip-on muffler 1811-3799 3 XR650L 93-09/12-21 Spark arrestor slip-on muffler 1821-2026 3 XR650R 00-07 Spark arrestor modular muffler FMF041023 3 HUSQVARNA FC/FX 250-450 16-18, FE 250-501 17-19 HEX slip-on muffler 1821-1716 3 FE 250/350 14-16 HEX slip-on muffler 1821-1627 3 FE 250 20-21 HEX slip-on muffler 1821-1998 3 FC/FX 250-450 16-17 HEX slip-on muffler 1821-1918 3 FE 501 20-23 HEX slip-on muffler 1821-1998 3 FITS MODEL DESCRIPTION PART # EMIS* KAWASAKI KLX125 03-06 Slip-on muffler 1821-0521 3 KLX140/L/G 08-24 Slip-on muffler 1821-08072 3 Spark arrestor muffler 1821-0808 3 KX250F 04-08 Spark arrestor slip-on muffler 1821-0671 3 KX250F 09-16 HEX spark arrestor slip-on muffler 1821-1520 3 KX250F 17-20 HEX slip-on muffler 1821-1794 3 KX250F 21 HEX slip-on muffler 1821-2038 3 KLX300R 20-21 HEX slip-on muffler 1821-2027 3 KLX400R 03-04 Spark arrestor modular muffler FMF043010 3 KLX400SR 03-04 Spark arrestor muffler 1821-2016 3 KX450F 06-08 Spark arrestor slip-on muffler 1821-0672 3 KX450F 09-11 HEX spark arrestor slip-on muffler 1821-1521 3 KX450F 12-15 HEX spark arrestor slip-on muffler 1821-1522 3 KXF450F 16-18 Slip-on muffler 1821-1723 3 KX450F 19-23 HEX slip-on muffler 1821-1886 3 KX450F 24-25 HEX slip-on muffler 1821-2091 3 KLR600/650/Tengai 84-07 Slip-on muffler 1811-2613 4 KLR650/Tengai 08-19 Slip-on muffler 1811-2614 3 KTM 250/350/450 SX-F 07-17, XC-F 07-17, XCF-W 08-14, SMR 07-10 HEX slip-on muffler 1821-1627 3 250/350/450 SX-F 15-18 HEX slip-on muffler 1821-1716 3 250/350/450 XC-F 16-18, EXC-F 16-19 HEX slip-on muffler 1821-1716 3 250/350 SX-F/XC-F 19-22 HEX slip-on muffler 1821-1918 3 350 XCF-W 20-22 HEX slip-on muffler 1821-1998 3 450/525 EXC/MXC/SX/XC 04-06, XC/XC-W 07 Spark arrestor slip-on muffler 1821-06891 3 450 SX-F/SXF FE/XC-F 18-22 HEX slip-on muffler 1821-1918 3 450 XCF-W 20-21, 23 HEX slip-on muffler 1821-1998 3 500 XCF-W 20-23 HEX slip-on muffler 1821-1998 3 POWERCORE 4 •Hi-Flo end cap boosts all-around performance •Computer-designed and dyno-tested for every 4-stroke application •Enhanced sonic evacuation delivers a higher flow of exhaust gases, which increases power •A stainless steel mid-pipe mates to the computer-designed rear can for lightweight durability •Round perforated steel inner cores make for optimum flow, using hi-flo technology •FMF’s exclusive cross-weave internal packing provides longevity and maximum sound dispersion •Elliptical aluminum can offers strategic sizing for superior performance •Optional Quiet Core insert will provide a decrease in sound level if desired •Features a screen-type spark arrestor that does not interrupt exhaust flow or performance 1 To be used with stock head pipe. 2 No spark arrestor. 1821-1534 1821-0540
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