FMF Racing Q4 Slip-On Muffler 044301 for Yamaha YFZ ATVs

The FMF Q4 Slip-On Muffler (044301) for Yamaha YFZ ATVs delivers a tangible power upgrade and improved throttle response through advanced internal geometry. Its multi‑stage packing, intricate chambers, and precision baffles optimize exhaust flow, yielding increased horsepower and torque while maintaining a regulated sound profile.

Built for durability and light weight, the can is crafted from aircraft‑grade aluminum and joined to a high‑strength stainless steel mid‑pipe. This combination withstands harsh off‑road conditions and helps reduce overall vehicle mass to enhance handling and agility on rough terrain.

Installation is straightforward: the Q4 Slip‑On mounts to the stock header or an FMF header, allowing a quick upgrade without a full system swap. The design emphasizes quiet performance with a max sound output of 96 dB, using internal packing to manage resonance while keeping the exhaust mounting compact and durable.

• Model: FMF Q4 Slip-On Muffler, part number 044301
• Application: Yamaha YFZ ATVs (2009–2026)
• Construction: Aircraft-grade aluminum can, high-strength stainless steel mid-pipe
• Performance: Increased horsepower and torque via optimized exhaust flow
• Sound: Max 96 dB, designed for controlled, race-tested quiet performance
• Installation: Slip-on design compatible with stock or FMF headers
• Extras: Spark arrestor included

FMF is the leader in high performance quiet technology and our Q4 is the next evolution in off road exhaust. The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available. With the Q4 you don’t need to hear the power, just feel the power!

• Developed over years of championship off-road racing
• Max Sound output 96dB; most models below 93dB
• Constructed from aircraft grade aluminum and high strength stainless steel
• Use with stock or FMF header

The FMF Racing Q4 Muffler for Yamaha is a high-performance exhaust component designed to enhance your motorcycle's power and sound. Crafted with precision, this muffler offers a significant upgrade over stock systems, providing increased horsepower and torque while maintaining a sleek and durable construction. Its innovative design ensures optimal exhaust flow, contributing to improved throttle response and overall engine efficiency. Built with quality materials, the FMF Q4 Muffler is engineered to withstand the rigors of off-road and street riding, making it a reliable choice for enthusiasts seeking both performance and longevity.
Installation is straightforward, allowing riders to quickly upgrade their exhaust system and enjoy immediate benefits. The muffler's compact size and lightweight construction help reduce overall bike weight, further enhancing handling and agility. Whether you're looking for a more aggressive sound or increased performance, the FMF Racing Q4 Muffler for Yamaha delivers consistent results. Choose this trusted brand and part number to upgrade your motorcycle's exhaust system today.

Features:

• High-performance muffler designed for Yamaha motorcycles

• Enhanced exhaust flow for increased horsepower and torque

• Durable construction with quality materials for longevity

• Improves throttle response and engine efficiency

• Lightweight design reduces overall bike weight