BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | OFFROAD EXHAUST EXHAUST 8 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”. FACTORY 4.1 RCT EXHAUST SYSTEMS • 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 FITS MODEL DESCRIPTION PART # EMIS* GASGAS EC 350F 21 System w/ stainless steel aluminum muffler, carbon fiber end cap and stainless steel MegaBomb header w/ side panel 1820-1954 3 System w/ blue anodized titanium muffler, carbon fiber end cap and stainless steel MegaBomb header w/ side panel 1820-1957 3 EX 350F 21-23 System w/ MegaBomb titanium header w/ carbon fiber end cap 1820-1874 3 MC/EX 450F 21-23 System w/ MegaBomb stainless header, aluminum w/ carbon fiber end cap 1820-1875 3 System w/ MegaBomb titanium header w/ carbon fiber end cap 1820-1876 3 HONDA CRF250R 22-24 System with stainless steel carbon fiber, conical/slash-cut end cap 1820-2002 3 System with blue anodized titanium with conical/slash-cut end cap 1820-2003 3 CRF250R/X 25-26 System w/ stainless steel carbon fiber and titanium Megabomb header and carbon fiber end cap 1820-2100 3 System w/ blue anodized titanium muffler, carbon fiber end cap and stainless steel MegaBomb header 1820-2101 3 CRF450R/RX 21-26 System w/ stainless steel aluminum muffler, carbon fiber end cap and stainless steel MegaBomb header 1820-1993 3 System w/ blue anodized titanium muffler w/ carbon end cap 1820-1994 3 HUSQVARNA FC/FX 350 19-22 System w/ MegaBomb titanium header w/ carbon fiber end cap 1820-1874 3 FE 350 20-22 System w/ stainless steel aluminum muffler, carbon fiber end cap and stainless steel MegaBomb header w/ side panel 1820-1954 3 System w/ blue anodized titanium muffler, carbon fiber end cap and stainless steel MegaBomb header w/ side panel 1820-1957 3 FC 450 18-22, FX 450 19-22 System w/ MegaBomb stainless header, aluminum w/ carbon fiber end cap 1820-1875 3 System w/ MegaBomb titanium header w/ carbon fiber end cap 1820-1876 3 FE 450 20-23 System w/ blue anodized titanium muffler, carbon fiber end cap and stainless steel MegaBomb header w/ side panel 1820-1958 3 FE 501 20-23 System w/ stainless steel aluminum muffler, carbon fiber end cap and stainless steel MegaBomb header w/ side panel 1820-1959 3 System w/ blue anodized titanium muffler, carbon fiber end cap and stainless steel MegaBomb header w/ side panel 1820-1960 3 •Meet AMA and FIM sound requirements •QuietCore 94 dB insert included •Spark arrestor included in muffler • Feature titanium PowerBomb header and midpipe, except where noted •Available in natural titanium or blue anodized finish with titanium or carbon fiber end caps •Made in the U.S.A. 1820-1985 1820-1876
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