FMF FACTORY 4.1 RCT S/O MFLR W/ CAR CAP TI YAM YFZ450R | 044400 Fantic as the friction on the

as the friction on the pull cable remains unchanged

FMF's Performance Packing is comprised of fine

6-ply rating offers 30% more cut resistance

Mechanical design is superior to stock by butting the case saver solidly up against the ignition cover

Blocks are designed to provide extra support on the bottom of the center knobs to optimize rigidity to deliver next-level longevity performance

FMF FACTORY 4.1 RCT S/O MFLR W/ CAR CAP TI YAM YFZ450R | 044400 Fantic as the friction on theAll new incorporating the latest in Resonance Chamber Technology Patented core shape lowers sound level while maintaining maximum power output Patented canister shape increases internal volume for more sound absorbing material Patented chamber design to enhance and refine exhaust pressure Factory Forward Engineering centralizes mass and is less prone to crash damage Tuned exhaust with optimized core specifications for each application Innovative rear