FMF Factory 4.1 RCT Muffler - Anodized Titanium CRF450X 2019-2025 041587 1821-1978 Big Bore Kit AR shield reinforcement on the

AR shield reinforcement on the palm slider for superior abrasion resistance

back main elastic bands and the 3D mesh behind the main CELL structure provides extra ventilation

Tapered design has square lines for elegant style

with each hand capable of being regulated individually

Can be oiled like stock filter for best performance

FMF Factory 4.1 RCT Muffler - Anodized Titanium CRF450X 2019-2025 041587 1821-1978 Big Bore Kit AR shield reinforcement on theRapid Tuning System (RTS) Shorter overall length that is less susceptible to crash damage Massive Power gains throughout the RPM range. Huge weight savings Made in the U. S. A.