BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | OFFROAD EXHAUST EXHAUST 38 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”. EVOLUTION LINE COMPLETE EXHAUST SYSTEMS •The flagship of the Akrapovic exhaust system range and simply the finest exhaust system available •Used and tested by our top factory teams in motorcycle racing •Each model is unique and dedicated to maximizing the engine’s performance, while reducing overall weight for optimized overall handling of the motorcycle •Made entirely of titanium •Perforated inner sleeve and inlet cap are all made of titanium •Flared or conical link pipe is made of titanium and welded to the muffler FITS MODEL DESCRIPTION PART # EMIS* HONDA CRF250R/RX 18-21 Titanium header/muffler/end cap 1820-19821, 2 3 CRF250R/RX 22-25 Titanium header/muffler/end cap 1820-2011 3 Optional noise damper for racetracks where 109 dB/A noise levels are required 1861-1804 N/A CRF450R/RX 21-24 Titanium header/muffler/end cap 1820-19911 3 CRF450R/RX 25 Titanium header/muffler/end cap 1820-2089 3 KAWASAKI KX250F 17-20 Titanium header/muffler/end cap 1820-2072 3 KX250/X 21-24 Titanium header/muffler/end cap 1820-2072 3 KX250/X 25 Titanium header/muffler/end cap 1820-2105 3 KX450F 19-20 Titanium header/muffler/end cap 1820-1884 3 KX450/X 21-23 Titanium header/muffler/end cap 1820-1884 3 KX450/X 24-25 Titanium header/muffler/end cap 1820-2052 3 KX450/X 25 Optional noise damper for racetracks where 109 dB/A noise levels are required 1861-1806 N/A FITS MODEL DESCRIPTION PART # EMIS* SUZUKI RM-Z250 19-25 Titanium header/muffler/end cap 1820-1905 3 RM-Z450 18-25 Titanium header/muffler/end cap 1820-18171 3 YAMAHA WR250F 19-23 Titanium header/muffler/end cap 1820-19921 3 WR250F 24-25 Titanium header/muffler/end cap 1820-2041 3 YZ250F/FX 19-23 Titanium header/muffler/end cap 1820-19921 3 YZ250F/FX 24-25 Titanium header/muffler/end cap 1820-2041 3 YZ250F 25 Optional noise damper for racetracks where 109 dB/A noise levels are required 1861-1805 N/A WR450F 21-23 Titanium header/muffler/end cap 1820-1913 3 WR450F 24-25 Titanium header/muffler/end cap 1820-2035 3 YZ450F 20-22 Titanium header/muffler/end cap 1820-1913 3 YZ450F 23-25 Titanium header/muffler/end cap 1820-2035 3 YZ450F 25 Optional noise damper for racetracks where 109 dB/A noise levels are required 1861-1805 N/A 1 With spark arrestor. 2 Dual mufflers. •Link pipe; header tube joint is milled on a state-of-the-art CNC machine and secured by high-quality, silicon-shielded tempered springs •Conical shaped header tube is made of titanium •Features a more durable welded bracket and titanium end cap •Exhaust systems meet FIM noise limits NOTE: For closed course competition use only. Not intended for street use. 1820-1982 1820-1817 1820-1992 1820-2052
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