MUFFLER TI 4.1 RCT YAM Billy Bolt metal filings can be a

metal filings can be a sign of extreme engine wear

Ultra-ventilated protective plates coupled w/ engineered channeled bio-foam allow increased laminar airflow

YZ450F 14-20

Ulysses XB12X FX 08-09

YZ125 87-22

MUFFLER TI 4.1 RCT YAM Billy Bolt metal filings can be aFactory 4. 1 RCT Slip On Muffler The Factory 4. 1 RCT incorporates FMF's Resonance Chamber Technology both internally and externally In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering moving the muffler closer to the motor to centralize mass The Factory 4. 1 RCT is constructed from only aerospace grade materials that meet their exacting specifications and