BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | OFFROAD EXHAUST EXHAUST 12 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 20-23 Hex spark arrestor muffler 1821-2006 3 GASGAS EC 250/350F 21 Hex spark arrestor muffler 1821-1999 3 EX 250/350/450F 21-23 Hex spark arrestor muffler 1821-1919 3 MC 250/450F 21-23 Hex spark arrestor muffler 1821-1919 3 HONDA CRF150F 03-17 Spark arrestor muffler 1821-0887 3 CRF150R 07-24 Spark arrestor muffler 1821-0543 3 CRF230F 03-17 Spark arrestor muffler 1821-0887 3 CRF250R 04-05 Spark arrestor muffler 1821-0653 3 CRF250R 22-23 Q4 Hex Muffler 1821-2051 3 CRF250X 04-09/12-17 Spark arrestor muffler 1821-0653 3 CRF450R 21-23 Q4 hex spark arrestor slip-on muffler 1821-2042 3 CRF450X 19-20 Hex spark arrestor muffler 1821-1952 3 XR650L 93-09, 12-20 Hex spark arrestor muffler 1821-2029 3 THE Q SERIES SLIP-ON MUFFLERS •The Q series features advanced engineering to precisely locate baffles and chambers to absorb sound •Less mass to enhance power-to-weight ratio •Quiet power with minimal sacrifice for performance •Q4 slip-on muffler unless noted Q4 •Developed over years of championship off-road racing •Twin-stage core design for lower sound output and extended life of packing material •Comes standard with spark arrestor Q4 HEX •Less sound equals more ground •Meets FIM World Enduro sound regulations •Power gains throughout the entire rpm range •Spark arrestor included •Pounds lighter than stock •Rugged design for off-road endurance •Made in the U.S.A. NOTE: FOR CLOSED COURSE COMPETITION USE ONLY. NOT INTENDED FOR STREET USE. Q4 Hex Q4
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