FMF Factory 4.1 RCT Slip-On Muffler Aluminum Carbon Cap 109dB

Experience a new level of performance and sound with the FMF Factory 4.1 RCT Slip-On Muffler. Engineered for enthusiasts, this advanced exhaust system delivers significant power gains across the entire RPM range while maintaining compliance with critical sound regulations.

Description

The FMF Factory 4.1 RCT Slip-On Muffler is a pinnacle of motorcycle exhaust technology, meticulously designed to elevate your riding experience. Central to its performance is the innovative Resonance Chamber Technology (RCT), which utilizes a patented core shape to effectively lower decibel levels without compromising raw power output. This sophisticated design incorporates internal ducts within the chambers, significantly increasing internal volume for optimized exhaust flow. The result is a noticeable surge in power across the entire powerband, from low-end torque to top-end horsepower, making it an ideal performance slip-on for competitive riders and serious enthusiasts alike.

Further enhancing its functionality, FMF's exclusive Factory Forward Engineering strategically centralizes mass, contributing to improved handling and a reduced susceptibility to crash damage – a crucial advantage in aggressive off-road conditions. The innovative rear end cap simplifies maintenance and customization, allowing for quick installation of tuning tip inserts or the integrated spark arrestor with just four screws. This versatile FMF Factory 4.1 RCT Slip-On Muffler is compatible with both your stock header and FMF's aftermarket headers, offering flexible upgrade paths. It comes complete with a QuietCore 94 dB insert and an integrated spark arrestor, ensuring it meets AMA and FIM sound requirements (excluding 2025 FIM regulations), providing a compliant yet powerful motorcycle exhaust system.

Features & Highlights

• Advanced Resonance Chamber Technology (RCT): Features a patented core design that expertly lowers sound output while maximizing power delivery across the RPM range, providing a compliant yet high-performance motorcycle exhaust system.
• Optimized Exhaust Flow: Internal ducts within the RCT system's chambers boost internal volume, leading to enhanced exhaust gas flow and significant power gains throughout the entire powerband.
• Factory Forward Engineering: Strategically centralizes mass for improved bike handling and increased resilience against crash damage, essential for demanding riding environments.
• User-Friendly End Cap Design: An innovative rear end cap allows for quick and simple installation of tuning tip inserts or the included spark arrestor, requiring the removal of only four screws.
• Versatile Header Compatibility: Engineered to seamlessly integrate with either your motorcycle's stock header or any FMF aftermarket header, offering flexible upgrade options.
• Integrated Sound Compliance: Includes a QuietCore 94 dB insert and a spark arrestor, ensuring the system meets current AMA and FIM sound requirements (Note: Will not pass 2025 FIM regulations).
• Premium Construction: Crafted from durable aluminum with a sleek carbon fiber end cap, offering both robust performance and a distinctive aesthetic.

Technical Specifications

• Product Type: Slip-On Muffler
• Technology: Resonance Chamber Technology (RCT), Factory Forward Engineering
• Construction Material: Aluminum body with Carbon Fiber End Cap
• Sound Level (Operating): 109 dB
• Included Inserts: QuietCore 94 dB Insert
• Spark Arrestor: Integrated
• Sound Compliance: Meets AMA and FIM sound requirements (pre-2025)

Important to Know

• 2025 FIM Sound Regulation: This muffler will not pass the 2025 FIM sound regulation.
• Header Compatibility: Designed for use with either a stock header or an FMF aftermarket header (header not included).