FMF

The FMF Factory 4.1 RCT full exhaust system combines proven race performance with controlled sound output. RCT (Resonance Chamber Technology) improves exhaust flow for stronger power across the entire RPM range while meeting AMA/FIM sound requirements (note: not compliant with 2025 FIM rule).

• RCT patented core lowers dB while maintaining maximum power
• Includes PowerBomb header + QuietCore 94dB insert
• Spark arrestor included; carbon-fiber end cap; Made in the USA

FMF Factory 4.1 RCT Full Exhaust System with MegaBomb design delivers stronger power across the rev range while keeping sound under control. RCT Resonance Chamber Technology helps lower dB without sacrificing performance, and Factory Forward Engineering centralizes mass for better durability.

• RCT patented core shape: lower decibels, maximum output
• Improved internal volume/flow for gains through the entire powerband
• QuietCore 94 dB insert included; AMA/FIM sound requirements (note: not 2025 FIM)

The FMF Factory 4.1 RCT is a high-performance full exhaust system designed to boost power across the entire range while controlling sound. Its patented RCT core and MegaBomb-style header improve exhaust flow, and the included QuietCore insert helps meet track sound limits.

• RCT core design: lower dB with maximum power output
• QuietCore 94 dB insert included; meets AMA/FIM sound requirements*
• Factory Forward Engineering: centralized mass, reduced crash exposure

FMF Factory 4.1 RCT Full Exhaust System delivers massive power gains across the RPM range with huge weight savings and a shorter design that’s less prone to crash damage. Built from aerospace-grade materials and made in FMF’s Southern California factory.

• Includes MegaBomb header and spark arrestor screen insert
• RCT (Resonance Chamber Technology™) + RTS (Rapid Tuning System)
• Aluminum muffler, stainless pipe, carbon-fiber end cap

The FMF Factory 4.1 RCT is a premium full exhaust system built for big power gains and major weight savings. Its shorter, centralized design helps reduce crash damage while improving mass centralization.

• RCT™ technology for improved performance across the RPM range
• Includes MegaBomb header + spark arrestor screen insert
• Aerospace-grade titanium with carbon-fiber end cap & RTS rapid tuning

FMF Factory 4.1 RCT kompletni izpušni sistem je zasnovan za resne pridobitve moči in manjšo težo v celotnem območju vrtljajev. Opremljen je z Resonance Chamber Technology™ ter krajšo zasnovo s centralizacijo mase, ki pomaga zmanjšati možnost poškodb ob padcu.

• Vključuje MegaBomb koleno + mrežasti vložek spark arrestor
• Titanova konstrukcija letalske kakovosti s karbonskim zaključnim pokrovom
• RTS (Rapid Tuning System) za hitro in enostavno nastavitev