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FMF Ti Factory 4.1 RCT (Slip-On) Carbon Fiber End Cap - 044409 - 2014-2017 Yamaha YZ450F, YZ450FX

Regular price $719.99 USD
Regular price $799.99 USD Sale price $719.99 USD
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FMF Ti Factory 4.1 RCT (Slip-On) Carbon Fiber End Cap - 044409 - 2014-2017 Yamaha YZ450F, 2016-2018 YZ450FX, and 2016-2018 WR450F 

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Introducing the Factory 4.1 RCT: Revolutionizing Motorsport Performance with Resonance Chamber Technology™

In the world of motocross, performance is everything. Riders are constantly searching for ways to improve their bikes' power, speed, and efficiency to gain an edge over the competition. Enter the Factory 4.1 RCT, a game-changing exhaust system by FMF that's taking the industry by storm. This cutting-edge product incorporates FMF's proprietary Resonance Chamber Technology™ (RCT) both internally and externally to deliver unparalleled power gains and weight savings. 

Aerospace Grade Materials for Superior Quality

The Factory 4.1 RCT isn't your average exhaust system. Manufactured entirely in FMF's Southern California factory, it is constructed from aerospace grade materials that meet their stringent specifications. This ensures exceptional quality and durability even under the most demanding conditions on the track.


  • The Factory 4.1 RCT, incorporates FMF's Resonance Chamber Technology™
  • It is complementary to their Factory Forward Engineering, which moves the muffler closer to the motor to centralize mass.
  • The Factory 4.1 RCT is made from only aerospace-grade materials that meet their specifications and is 100% manufactured at their Southern California factory
  • The Factory 4.1 RCT provides massive power gains throughout the RPM range
  • Offers a huge weight savings.
  • Additionally, it features the Rapid Tuning System (RTS).

Yamaha YZ450F Performance Upgrades Engine Mods and Accessories

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