FMF Q4 HEX Muffler 045590 — Quiet, High-Performance Slip-On for Off-Road Bikes and ATVs

The FMF Q4 HEX 045590 slip-on muffler quietly unleashes power through a precision-engineered chamber and multistage packing. It improves exhaust flow and delivers horsepower gains across the entire RPM range while meeting stringent sound regulations for USFS and FIM World Enduro events.

• Spark arrestor included
• Pounds lighter than stock
• Rugged, durable construction designed for off-road endurance
• MADE IN THE USA; FMF is the only US manufacturer to offer dedicated quiet exhaust systems
• Easy installation compatible with a wide range of off-road motorcycles and ATVs
• Optimized exhaust sound and emissions for a balanced ride

The 045590 Q4 HEX muffler is engineered to enhance performance for riders who demand both power and quiet operation, making it a reliable upgrade that complements aggressive trails and competitive environments alike.

FMF is the leader in high performance quiet technology and our Q4 HEX 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!

-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

-MADE IN THE USA

The FMF Racing Q4 Muffler Part 045590 is engineered to enhance the performance of your off-road motorcycle or ATV. Crafted by FMF Racing, this high-quality muffler delivers improved exhaust flow and increased power output. Its durable construction ensures longevity even under demanding riding conditions, making it a reliable upgrade for enthusiasts seeking both performance and durability. The design features precise engineering to optimize exhaust sound and emissions, providing a balanced balance of power and reduced noise levels.
The FMF Q4 Muffler is designed for easy installation and compatibility with a wide range of off-road vehicles. It offers a sleek appearance that complements your bike's aesthetics while providing functional benefits. Whether you're looking to boost horsepower or improve exhaust sound, this muffler is an excellent choice for riders who demand quality and performance.
Constructed from high-grade materials, the FMF Q4 Muffler is built to withstand the rigors of off-road riding. Its robust design ensures it remains reliable during intense riding sessions, while its efficient exhaust flow helps enhance overall engine performance. This muffler is suitable for riders who want to maximize their vehicle's capabilities without compromising on durability or sound quality.

Features:

• Engineered for improved exhaust flow and increased horsepower

• Durable construction designed to withstand harsh off-road conditions

• Easy installation compatible with various off-road motorcycles and ATVs

• Optimized exhaust sound for a balanced ride experience

• High-quality materials ensure long-lasting performance