FMF Anodized Titanium 4.1 RCT Slip-On Exhaust

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our 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 our exacting specifications and is manufactured 100% at our Southern California factory.

The FMF Factory 4.1 slip-on exhaust is the same exhaust that professional racers use to bring home championships around the world. The technology in this slip-on exhaust cannot be found in any other exhaust. Since the Factory 4.1 slip-on exhaust is meant to be used for competition, FMF made this pipe ready to take to the track straight out of the box.

  • Massive power gains throughout the RPM range
  • Huge weight savings over stock exhaust
  • Anodized titanium midpipe
  • Carbon fibre end cap
  • RTS (Rapid Tuning System) for quick and easy trackside tuning
  • Removable spark arrestor included
  • Quiet insert included (94db)
  • Can be used with FMF or stock OEM Header
  • Used by BTO Sports KTM, JGR Toyota Yamaha, NFab Yamaha, Rockstar Energy Racing KTM
  • 100% made in the USA
  • 1.90kg (4.2bs)


Compatible with the following Motorcycles:
HON TRX450R 04-14
SKU 6107613
Brand FMF
Shipping Weight 33.3300kg

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