FMF Factory 4.1 RCT Exhaust System Yamaha YZ 450 20-23

Features:

• The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externally
• Shorter overall length that is less susceptible to crash damage and complementary to FMF's Factory Forward Engineering - moving the muffler closer to the motor to centralize mass
• The Factory 4.1 RCT is constructed from only aerospace grade materials that meet FMF's exacting specifications and is manufactured 100% at their Southern California factory
• Massive Power gains throughout the RPM range.
• Huge weight savings
• New RTS (Rapid Tuning System)
• Includes MegaBomb header
• Includes spark arrestor screen insert
• NOTE: Will not pass 2025 FIM sound regulation

Fit the models: