FMF Yamaha YFZ 450R Factory 4.1 RCT Slip-On Exhaust System FMF Yamaha YFZ 450R Factory 4.1 RCT Slip-On Exhaust System Fully Assembled by Wienen Motorsports

Fully Assembled by Wienen Motorsports – Expert craftsmanship and proven race-winning engine build standards

Available with or without built-in braces

all orders are custom built and have a 2-3 week turn around time

MotoGP developed slipper clutch technology

Engineered with the highest quality materials and components

FMF Yamaha YFZ 450R Factory 4.1 RCT Slip-On Exhaust System FMF Yamaha YFZ 450R Factory 4.1 RCT Slip-On Exhaust System Fully Assembled by Wienen MotorsportsFeatures: 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 is manufactured 100% at