FMF Q4 HEX Slip-On Muffler with Spark Arrestor

The FMF Q4 HEX Slip-On Muffler brings a new level of quiet performance to off-road riding. Engineered with advanced technology, this FMF Q4 HEX Slip-On Muffler allows riders to maximize power without excessive noise, making it an ideal choice for competitive environments.

Description

As the next evolution in off-road exhaust systems, the FMF Q4 HEX Slip-On Muffler integrates high-performance quiet technology. It employs intricate chambers, baffles, and proprietary multi-stage packing material, making it the best-performing quiet muffler available. This innovative design means you don’t just hear the power; you truly feel it, translating to less sound and more ground covered. Riders will experience significant power gains throughout the entire RPM range, enhancing engine response and overall performance on the track or trail.

Designed for the rigors of off-road competition, this muffler is substantially lighter than stock units, contributing to improved bike handling and agility. Its rugged construction ensures exceptional endurance in demanding conditions. The Q4 HEX also meets current USFS and FIM World Enduro sound regulations, making it suitable for many competitive events. It is crucial to note that this product is specifically for closed course competition use only and is not intended for street use. Additionally, it will not pass the stricter 2025 FIM sound regulations.

Features & Highlights

• Advanced Quiet Technology: Experience superior sound reduction with FMF's proprietary multi-stage packing and baffle system, allowing for extended ride times without excessive noise while maintaining peak performance.
• Optimized Power Delivery: Achieve significant power gains across the entire RPM range, providing enhanced throttle response and improved engine output for competitive off-road riding.
• Regulatory Compliance: Designed to meet USFS and FIM World Enduro sound regulations, ensuring eligibility for many off-road events (Note: Does not meet 2025 FIM sound regulations).
• Integrated Spark Arrestor: Ride with confidence in regulated off-road areas thanks to the included spark arrestor, which minimizes fire risk.
• Lightweight Construction: Enjoy improved bike handling and agility due to a design that is substantially lighter than stock mufflers, reducing overall vehicle weight.
• Durable Off-Road Design: Built with a rugged construction to withstand the extreme conditions and demands of aggressive off-road and competition use, ensuring long-lasting reliability.

Technical Specifications

• Product Type: Slip-On Muffler
• Model: Q4 HEX
• Technology: High Performance Quiet Technology
• Sound Compliance: USFS and FIM World Enduro (pre-2025 regulations)
• Special Feature: Integrated Spark Arrestor
• Weight: Lighter than stock
• Intended Use: Closed Course Competition Only

Important to Know

• For Closed Course Competition Use Only: This product is not intended for street use.
• 2025 FIM Sound Regulation: Will not pass 2025 FIM sound regulation.