FMF 20-23 FE450 EXHAUST ALUM 4.1 RCT MGBMB (045651)

RCT (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 spark arrestor with the removal of four screws

Meet AMA and FIM sound requirements

QuietCore 94db insert included

Spark arrestor included in muffler

Made in the U.S.A.

Features FMF PowerBomb header