FMF Factory 4.1 Muffler 042396 – Resonance Chamber Technology for Enhanced Performance and Reduced Noise

The FMF Factory 4.1 Muffler, part number 042396, combines advanced Resonance Chamber Technology (RCT) with durable construction to deliver superior exhaust performance. Featuring a patented core shape, this muffler effectively reduces noise levels while maintaining maximum power output, making it ideal for competitive and recreational riding. Internal ducts within the chambers increase internal volume, which improves exhaust flow and results in noticeable power gains across the entire RPM range. Whether you're riding on the track or off-road, this design ensures consistent performance and responsiveness.

The Factory Forward Engineering approach centralizes mass within the muffler, enhancing balance and stability while reducing vulnerability to crash damage. Installation is simplified thanks to an innovative rear end cap that allows for quick and easy attachment of tuning tip inserts or a spark arrestor, requiring only four screws for removal. This feature makes maintenance straightforward and allows riders to customize their exhaust sound and performance preferences easily.

Meeting AMA and FIM sound requirements, the FMF Factory 4.1 Muffler also includes a QuietCore 94dB insert for quieter operation when needed. The spark arrestor is integrated into the muffler, providing added safety and compliance for off-road environments. Constructed in the U.S.A., this muffler combines quality craftsmanship with high-performance features, ensuring durability and reliable operation over time. Whether upgrading your existing exhaust system or building a new setup, this muffler offers a perfect balance of power, noise control, and ease of use.

Features:

• Resonance Chamber Technology (RCT): Patented core design reduces noise while maintaining maximum power output

• Internal ducts: Increase internal volume for improved exhaust flow and power gains

• Factory Forward Engineering: Centralizes mass for better balance and crash resistance

• Easy installation: Rear end cap allows quick mounting of tuning tips or spark arrestor with four screws

• Sound compliance: Meets AMA and FIM sound standards with included QuietCore 94dB insert

• Spark arrestor: Integrated for safety and environmental compliance

• Made in U.S.A.: High-quality craftsmanship and durability

ATTRIBUTES:

BRAND: FMF

MPN: 042396