FMF Factory 4.1 RCT Complete Exhaust System – YAMAHA YZ450 2023–2025

FMF Factory 4.1 RCT Complete Exhaust System – YAMAHA YZ450 2023–2025

The FMF Factory 4.1 RCT full exhaust system features the advanced RCT (Resonance Chamber Technology), an integrated resonance chamber that reduces sound output while maintaining maximum power. The RCT design increases internal volume and optimizes airflow, ensuring a significant boost in overall performance and throttle response.

Main Features

• Factory Forward Engineering: mass centralization design keeps the exhaust compact, protected from impacts and damage.
• Innovative end cap allows easy installation of decorative inserts or spark arrestor using four screws.
• QuietCore 94 dB insert included.
• Spark arrestor insert included.
• Includes MegaBomb header and mid-pipe for maximum torque and top-end power.
• Available in natural titanium or blue anodized titanium finish, with titanium or carbon fiber end caps.
• Meets AMA & FIM sound regulations.

Available Versions

• 044478 – Blue anodized titanium – Stainless steel MegaBomb system with carbon fiber end cap.
• 044477 – Natural finish – Stainless steel MegaBomb system with carbon fiber end cap.

For closed-course competition use only. Not approved for street use.