2021 CRF450R EXHST 4.1RCT AN TI-TI MGBM

FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output Made in the U.S.A. QuietCore 94 dB insert included Meets AMA and FIM sound requirements Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws