BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | 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”. 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 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 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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