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FMF Factory 4.1 RCT Exhaust System

$902.49$1,306.24
$949.99$1,374.99
Save up to $68.75 5%
Price depends on fitment. Select your vehicle to continue.
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This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

FMF Factory 4.1 RCT Full System

The FMF Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology both internally and externally. In addition, FMF has achieved a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering which moves the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from aerospace grade materials that meet FMF’s exacting specifications and is manufactured 100% in their Southern California factory.

Features:

  • Massive power gains throughout the RPM range
  • Huge weight savings over stock exhaust
  • RTS (Rapid Tuning System) for quick and easy track-side tuning
  • Removable spark arrestor included
  • Meets AMA and FIM sound requirements 
  • 100% made in the USA
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This Product Fits:


Gas Gas
EX 250F 2021-2023
EX 350F 2021-2023
MC 250F 2021-2023
Honda
CRF450R 2021-2024
CRF450R 50th Anniversary Edition 2023
CRF450R-S 2023-2024
CRF450R Works Edition 2021-2024
CRF450RX 2021-2024
Husqvarna
FC250 2019-2022
FC350 2019-2022
FE250 2020
FE350 2020-2022
FE450 2023
FE501 2020-2022
FX350 2019-2022
KTM
250 SX-F 2019-2022
250 SX-F Factory Edition 2021
250 XC-F 2019-2022
350 SX-F 2019-2022
350 XC-F 2019-2022
350 XC-F Kailub Russell 2021
350 XCF-W 2020-2022
450 XCF-W 2023
500 XCF-W 2020-2022
Kawasaki
KX250 2019-2020
KX250F 2017-2018
KX450 2019-2023
KX450SR 2022-2023
KX450X 2021-2023
Yamaha
YFZ450R 2009-2022
YFZ450X 2011
YZ450F 2020-2022
YZ450F 2023-2024
YZ450F Monster Energy Race Edition 2022
YZ450FX 2024
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