The FMF Q has always been in a league of its own and our latest Q4 Hex is the most significant upgrade to date. You don't need to settle for a plugged up moto muffler hampered by an insert when you can have a compliant muffler engineered for performance.
-Less sound equals more ground
-Meets USFS and 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
-Only US manufacturer to offer dedicated quiet exhaust systems (94-96 dB with insert installed)
-MADE IN THE USA
-Can be used with FMF or Stock OEM Header
Fits 2010-2019 350/400/450/498/520 RR/RS models. For Closed Course Competition Use Only. Not Intended for Street Use. Dimensional weight listed.
FMF Beta RR|RS|RR-S (10-19) Q4 Hex Slip-On
Produced by FMF of USA