BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | OFFROAD EXHAUST EXHAUST 10 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 350/390/430/480 RR 20-24 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-2007 3 450 RX 15-23 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-2102 3 GASGAS EC 250/350F 21-23 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-2001 3 EC 250/350F 21-23 Slip-on muffler w/ stainless steel mid-pipe 1821-2000 3 EX/MC 250F 21-23 Anodized titanium slip-on muffler 1821-1925 3 EX 350/450F, MC450F 21-23 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1920 3 Anodized titanium slip-on muffler 1821-1921 3 HONDA CRF250R 22-23 Natural aluminum finish with carbon fiber end cap 1821-2052 3 Blue anodized finish, titanium with carbon fiber end cap 1821-2053 3 CRF450R/RX 19-20 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1978 3 CRF450R 21-23 Stainless steel w/ carbon fiber end cap 1821-2043 3 Anodized titanium slip-on muffler 1821-2044 3 CRF450X 05-09/12-14 Stainless steel/aluminum slip-on muffler 1821-1563 3 HUSQVARNA FE 250/350 14-16 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1633 3 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1631 3 FC 250/450 14-15, FE 501 14-15 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1644 3 FC 250/350 16-18 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1719 3 Anodized titanium slip-on muffler 1821-1721 3 FC 250 19-23 Anodized titanium slip-on muffler 1821-1925 3 FE 250 20-22 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-2001 3 FE 250/350F/450/501 20-21, FE 350 Rockstar Edition 21 Slip-on muffler w/ stainless steel mid-pipe 1821-2000 3 FITS MODEL DESCRIPTION PART # EMIS* HUSQVARNA (CONT) FC/FX 350/450 19-22 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1920 3 Anodized titanium slip-on muffler 1821-1921 3 FE 350 20-22 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-2001 3 FC 450 16-18 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1719 3 Anodized titanium slip-on muffler 1821-1721 3 KAWASAKI KX250F 09-16 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1391 3 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1222 3 KX250 19-20 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1953 3 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1955 3 KX250 21-23 Aluminum slip-on muffler w/ carbon fiber end cap 1821-2035 3 Blue anodized titanium muffler w/ carbon fiber end cap 1821-2036 3 KX450F 09-11 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1392 3 Titanium slip-on muffler w/ carbon fiber end cap 1821-1227 3 KX450F 24-25 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-2093 3 Blue anodized titanium muffler w/ carbon fiber end cap 1821-2094 3 KX450F 12-15 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1393 3 Titanium slip-on muffler w/ carbon fiber end cap 1821-1337 3 KX450F 16-18 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1726 3 KX450 19-23, KX450X 21 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1888 3 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1890 3 FACTORY 4.1 RCT SLIP-ON MUFFLERS • RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output •Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power •FMF’s Factory Forward Engineering centralizes mass and is less prone to crash damage •Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws •Compatible with stock header or FMF header •Meet AMA and FIM sound requirements •QuietCore 94db insert included •Spark arrestor included in muffler •Available in natural titanium or blue anodized finish with titanium or carbon fiber end caps •Made in the U.S.A. 1821-2035 1821-2007 1821-1563
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