FMF Factory 4.1 Slip-On Exhaust | 041589 dirt Works excellent in gnarly technical

Works excellent in gnarly technical single-track terrain

Fitment: use w/ stock header

World Off-road Championship Series (WORCS) & Desert Racing (DR)

(2001-Current) YZ250F

FMF Factory 4.1 Slip-On Exhaust | 041589 dirt Works excellent in gnarly technicalAll 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