FMF 045646 HEX Slip-On Muffler with Spark Arrestor - Q4

The FMF Q4 HEX Slip-On Muffler represents the next evolution in high-performance quiet exhaust technology for off-road motorcycles. Engineered with intricate internal chambers, baffles, and proprietary multistage packing material, this muffler delivers exceptional power gains while maintaining strict sound compliance for trail riding and enduro competition.

Key Features:

• Advanced quiet technology provides power gains throughout the entire RPM range without excessive noise
• Meets USFS (U.S. Forest Service) and FIM World Enduro sound regulations, typically under 96dB
• Aircraft-grade aluminum construction with natural finish for durability and weight savings
• High-strength stainless steel midpipe and endcap for corrosion resistance
• Integrated spark arrestor screen insert included for legal trail riding
• Quiet insert included for additional sound reduction when needed
• Weighs only 5.1 lbs—significantly lighter than stock exhaust systems
• Rugged slip-on design built for off-road endurance racing
• Made in the USA by FMF Racing

This slip-on muffler is designed for closed course use and fits select KTM and Husqvarna off-road models. The hexagonal muffler body design provides a distinctive look while optimizing internal flow dynamics. With the Q4 HEX, you don't need to hear the power—just feel it.