FMF Factory 4.1 RCT Exhaust - Aluminum CRF450R/RX 2021- 2025 041604 1820-1993 Competition Handlebar — ATV Race/Competition Connect airbox to backside of

Connect airbox to backside of carburetor

They are made to fit from mini riders to adults

Flap designed to protect brake / clutch pumps

By flashing your ECU you are able to tune your bike without interfering with critical correction factors resulting in smoother power gains than ever before possible

seals and spacers in the link

FMF Factory 4.1 RCT Exhaust - Aluminum CRF450R/RX 2021- 2025 041604 1820-1993 Competition Handlebar — ATV Race/Competition Connect airbox to backside ofRCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output 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 FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage Innovative rear end cap features simple installation of tuning tip inserts or