FMF Factory 4.1 RCT Yamaha YZ450F (18-20)

From the outset, Factory 4.1 RCTs stand out from other mufflers thanks to the use of top-of-the-range materials, providing increased power and torque across the entire engine speed range, as well as considerable weight savings compared to the original system.

• Factory 4.1 RCT aluminum muffler
• Carbon fiber end cap
• Stainless steel connecting tube
• Spark arrester included
• For use in closed course only
• Noise reducer included
• New RTS (Rapid Tuning System)