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Ships within 48 hours · Estimated delivery Aug 25 - Aug 30
Cylinders are finished slightly undersized so they may be finish-honed to fit your pistons
Die-cast head measures 4" x 4"
Conical shaped header tube is made of titanium
Manufactured from OEM-grade material with precision tooling
FMF Factory 4.1 RCT Exhaust - Aluminum CRF450R/RX 2021- 2023 041604 1820-1993 Head Bolt Cover Cylinders are finished slightly undersizedRCT (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