BOLD MAGENTA part numbers are new for 2025 EXHAUST DRAGSPECIALTIES.COM OFFROAD UPDATE | 2025 EXHAUST OFFROAD DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 3-5 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”. 181 FITS MODEL DESCRIPTION PART # EMIS* HONDA CRF250R/RX 25 Noise damper for Evolution system 1861-1804 3 CRF450R/RX 25 Single titanium muffler w/ titanium end cap 1820-2089 3 KAWASAKI KX450/X 25 Noise damper for Evolution system 1861-1806 3 FITS MODEL DESCRIPTION PART # EMIS* YAMAHA YZ250F/FX 25 Noise damper for Evolution system 1861-1805 3 YZ450F 25 Noise damper for Evolution system 1861-1805 3 EVOLUTION LINE COMPLETE EXHAUST SYSTEM • Completely constructed from lightweight, high-grade titanium alloys •Different thicknesses in various sections ensure perfect protection and reduce overall weight and allow the added strength created by the design to provide enhanced resilience under the most demanding conditions • Designed to fit perfectly within the limited space on the motorcycle, it has been tailored to be as large as possible within the space available •This allows increased sound silencing to mitigate the impact on the natural environment, while also facilitating improved flow for the exhaust gases from the combustion chamber with as few restrictions as possible •Power and torque levels are increased when tested on the in-house dyno in back-to-back tests against a standard stock exhaust system •Increased response through the entire rev range • New profiled surface, which influences the deep, full sound, and an integrated resonance chamber for optimum performance befitting the sound of an Akrapovic exhaust, all designed to meet FIM noise limits for competition •Finished with a specially imprinted logo on the surface (no sticker or engraving) •Developed for use on closed-course competition circuits only •Simple plug-and-play operation to install with no remapping needed •Optional noise dampers for the Evolution Line were specially developed for use on racetracks where 109 dB/A noise levels are required (sold separately) •See page 38 of the 2025 Parts Unlimited Offroad catalog for the complete line of Akrapovic Evolution exhaust systems NOTE: For closed course competition use only. Not intended for street use. 1861-1805 1861-1806 1820-2089
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